The object of the present invention is to provide spherical magnesium oxide having high sphericity and excellent moisture resistance and filling properties in resin without including a certain amount of boron or lithium, and a method for producing the same. The present invention is spherical magnesium oxide having the total content of elements belonging to the 3rd to 4th periods of the periodic table (except for the elements belonging to the 2nd and 18th groups) and yttrium of 500 to 12,000 ppm, having a volume-based cumulative 50% particle diameter (D50) measured by a laser diffraction/scattering particle size distribution measurement of 1 to 200 μm, and wherein a sphericity read from a SEM photomicrograph of 1.00 to 1.20.
The purpose of the present invention is to provide: spherical magnesium oxide particles having high sphericity and superior moisture resistance and filling properties; a spherical magnesium oxide powder; and a method for producing same. The present invention pertains to spherical magnesium oxide particles having an SEM diameter of 3-200 μm, a sphericity of 1.00-1.20 as observed from an SEM photograph, and 2 or less grain boundary intersections on a surface as observed from an SEM photograph.
5050) as found by laser diffraction particle size distribution measurement is in the range of 3-200 μm, and sphericity as observed from an SEM image is 1.00-1.20.
A magnesium oxide powder includes a magnesium oxide particle, wherein the number of an open pore communicating with a surface of the magnesium oxide particle measured by a specific measurement method is 8.0×10−4/μm2 or less.
A magnesium oxide powder, including a specific magnesium oxide particle, can suppress an increase in viscosity when a resin is filled therewith and can realize high thermal conduction of a resin composition including the resin, and a filler composition, a resin composition, and a heat dissipation part including the magnesium oxide powder. The magnesium oxide powder includes a magnesium oxide particle, wherein an oil absorption of the magnesium oxide particle in the case of linseed oil measured according to JIS K 5101-13-1 is 2.5 mL/10 g or less.
The purpose of the present invention is to provide a magnesium oxide which is for an annealing separating agent and which is used for obtaining a grain-oriented electrical steel sheet having excellent coating characteristics. The present invention is a magnesium oxide for an annealing separating agent, for which the BET specific surface area is 12.0 m2/g to 30.0 m2/g and, according to measurement of the pore size distribution by mercury intrusion, the modal pore diameter is at least 0.1 µm but less than 0.4 µm and the modal pore volume is at least 1.3 cm3/g.
C23C 22/00 - Traitement chimique de surface de matériaux métalliques par réaction de la surface avec un milieu réactif laissant des produits de réaction du matériau de la surface dans le revêtement, p. ex. revêtement par conversion, passivation des métaux
C21D 8/12 - Modification des propriétés physiques par déformation en combinaison avec, ou suivie par, un traitement thermique pendant la fabrication d'objets à propriétés électromagnétiques particulières
C21D 9/46 - Traitement thermique, p. ex. recuit, durcissement, trempe ou revenu, adapté à des objets particuliersFours à cet effet pour tôles
7.
MAGNESIUM OXIDE POWDER, FILLER COMPOSITION, RESIN COMPOSITION, AND HEAT DISSIPATION PART
A magnesium oxide powder containing magnesium oxide particles, wherein an average sphericity of a magnesium oxide particle having a projected area equivalent circle diameter of a particle cross section by microscopy of 10 μm or more among the magnesium oxide particles is 0.73 or more and 0.95 or less, a proportion of a magnesium oxide particle having a sphericity of 0.65 or less among the magnesium oxide particles is 20% or less on a number basis, and a proportion of a magnesium oxide particle having a sphericity of 0.55 or less among the magnesium oxide particles is 15% or less on a number basis.
5050) is 1 to 200 μm when measured by a laser diffraction scattering particle size distribution measurement, and the sphericity determined from an SEM image is 1.00 to 1.20.
The purpose of the present invention is to provide a magnesium oxide which is for an annealing separating agent and which is used for obtaining a grain-oriented electrical steel sheet having excellent coating characteristics. The magnesium oxide for an annealing separating agent according to the present invention exhibits a CAA40% of 50-170 seconds and a ratio (T2/T1) of 3.0 or more regarding a time (T2) to reach a reaction rate of 20 mol% with respect to a time (T1) to reach a reaction rate of 10 mol% in a pH-stat method.
C21D 8/12 - Modification des propriétés physiques par déformation en combinaison avec, ou suivie par, un traitement thermique pendant la fabrication d'objets à propriétés électromagnétiques particulières
C21D 9/46 - Traitement thermique, p. ex. recuit, durcissement, trempe ou revenu, adapté à des objets particuliersFours à cet effet pour tôles
C22C 38/00 - Alliages ferreux, p. ex. aciers alliés
C22C 38/60 - Alliages ferreux, p. ex. aciers alliés contenant du plomb, du sélénium, du tellure, de l'antimoine, ou plus de 0,04% en poids de soufre
H01F 1/147 - Alliages caractérisés par leur composition
C23C 22/00 - Traitement chimique de surface de matériaux métalliques par réaction de la surface avec un milieu réactif laissant des produits de réaction du matériau de la surface dans le revêtement, p. ex. revêtement par conversion, passivation des métaux
The purpose of the present invention is to provide: spherical magnesium oxide having high sphericity, exceptional moisture resistance, and exceptional fluidity in a resin composition when a resin is filled therewith. The present invention is a spherical magnesium oxide characterized by containing 300-2000 ppm of boron, by the content of lithium being less than 15 ppm, and by the sphericity read from an SEM photograph in a volume-based cumulative 50% particle diameter (D50) range of 3-200 μm by laser diffraction scattering particle size distribution measurement being 1.00-1.20.
The purpose of the present invention is to provide: a magnesium oxide powder that contains specific magnesium oxide particles, that can minimize any rise in viscosity when a resin is filled with said powder, and that can realize the high thermal conductivity of a resin composition containing the resin; and a filler composition, a resin composition, and a heat dissipating component containing the magnesium oxide powder. This magnesium oxide powder contains magnesium oxide particles, and the oil absorption value of the magnesium oxide particles with respect to linseed oil, measured in accordance with JIS K5101-13-1, is 2.5 mL/10 g or less.
The purpose of the present invention is to provide: a magnesium oxide powder which contains specific magnesium oxide particles, can suppress an increase in viscosity when filled into a resin, and can achieve an increase in thermal conductivity of a resin composition that contains the resin; and a filler composition, a resin composition and a heat-dissipating member that contain the magnesium oxide powder. This magnesium oxide powder contains magnesium oxide particles and is such that the number of open pores that are connected to the surface of the magnesium oxide particles is 8.0×10-4pores/μm2 or less, as measured using a specific measurement method.
The purpose of the present invention is to provide: a magnesium oxide powder comprising specific magnesium oxide particles, said magnesium oxide powder being capable of suppressing an increase in viscosity when filled in a resin and imparting a high heat conductivity to a resin composition that contains the resin; and a filler composition, a resin composition and a heat dissipating component each containing the magnesium oxide powder. The magnesium oxide powder according to the present invention comprises magnesium oxide particles, wherein: among the magnesium oxide particles, the average sphericity of magnesium oxide particles, which have a projected area equivalent diameter of the cross-section of the particles measured by the microscopic method of 10 μm or more, is 0.73-0.95 inclusive; among the magnesium oxide particles, the ratio of magnesium oxide particles having a sphericity of 0.65 or less is 20% or less based on the particle number; and among the magnesium oxide particles, the ratio of magnesium oxide particles having a sphericity of 0.55 or less is 15% or less based on the particle number.
NATIONAL UNIVERSITY CORPORATION CHIBA UNIVERSITY (Japon)
Inventeur(s)
Tsutsumi, Keisuke
Ootsuka, Yasuhiro
Nakanishi, Manami
Ryu, Junichi
Abrégé
This chemical heat storage material contains a hydroxide and/or an oxide of an alkaline earth metal, wherein the total content of boron and fluorine as the content of the alkaline earth metal with respect to the hydroxide is 10-1,200 ppm (exclusive of 1,200). Said chemical heat storage material further contains an alkali metal compound, wherein the amount of the alkali metal compound is preferably 0.1-50 mol% with respect to the hydroxide and/or the oxide of the alkaline earth metal.
C09K 5/16 - Substances sujettes à des réactions chimiques lors de leur utilisation
F28D 20/00 - Appareils ou ensembles fonctionnels d'accumulation de chaleur en généralAppareils échangeurs de chaleur de régénération non couverts par les groupes ou
NATIONAL UNIVERSITY CORPORATION CHIBA UNIVERSITY (Japon)
Inventeur(s)
Tsutsumi, Keisuke
Ootsuka, Yasuhiro
Nakanishi, Manami
Ryu, Junichi
Abrégé
A chemical heat storage material containing magnesium hydroxide and/or magnesium oxide, wherein the ratio of the half width of a diffraction peak at a Bragg angle of 2θ=38° in the (101) plane of magnesium hydroxide in X-ray diffraction measurement using CuKα rays after a hydration reaction of the chemical heat storage material to the half width of a diffraction peak at a Bragg angle of 2θ=43° in the (200) plane of magnesium oxide in X-ray diffraction measurement using CuKα rays after a dehydration reaction of the chemical heat storage material is 0.5-2 (inclusive).
C09K 5/16 - Substances sujettes à des réactions chimiques lors de leur utilisation
F28D 20/00 - Appareils ou ensembles fonctionnels d'accumulation de chaleur en généralAppareils échangeurs de chaleur de régénération non couverts par les groupes ou
The objective of the present invention is to provide: a spherical magnesium oxide which has high sphericity and excellent moisture resistance, and has excellent fluidity by which a resin composition exhibits excellent fluidity when filled in a resin; and a method for producing the same. The present invention is a spherical magnesium oxide characterized in that: 10-2000 ppm of boron is contained; the total content of silicon and phosphorus is 300-4000 ppm; and the sphericity that can be read from the SEM photograph is 1.00-1.10, when the volume-based cumulative 50% particle diameter (D50) measured by means of a laser diffraction scattering particle size distribution measurement, is in the range of 3-200 μm.
C09K 5/16 - Substances sujettes à des réactions chimiques lors de leur utilisation
F28D 20/00 - Appareils ou ensembles fonctionnels d'accumulation de chaleur en généralAppareils échangeurs de chaleur de régénération non couverts par les groupes ou
18.
MICROWAVE ABSORBING COMPOSITION, MICROWAVE ABSORBING BODY AND MICROWAVE HEATING BODY
xyz444. A microwave absorbing body and a microwave heating body according to the present invention are configured of this microwave absorbing composition. Preferably, this microwave absorbing body and this microwave heating body are powders, molded bodies or sintered bodies. A microwave heating device is configured so as to comprise this microwave heating body.
C04B 35/56 - Produits céramiques mis en forme, caractérisés par leur compositionCompositions céramiquesTraitement de poudres de composés inorganiques préalablement à la fabrication de produits céramiques à base de non oxydes à base de carbures
The purpose of the present invention is to provide: spherical magnesium oxide having high sphericity, exceptional moisture resistance, and exceptional fluidity in a resin composition when a resin is filled therewith. The present invention is a spherical magnesium oxide characterized by containing 300-2000 ppm of boron, by the content of lithium being less than 15 ppm, and by the sphericity read from an SEM photograph in a volume-based cumulative 50% particle diameter (D50) range of 3-200 μm by laser diffraction scattering particle size distribution measurement being 1.00-1.20.
The objective of the present invention is to provide: a spherical magnesium oxide which has high sphericity and excellent moisture resistance, and has excellent fluidity by which a resin composition exhibits excellent fluidity when filled in a resin; and a method for producing the same. The present invention is a spherical magnesium oxide characterized in that: 10-2000 ppm of boron is contained; the total content of silicon and phosphorus is 300-4000 ppm; and the sphericity that can be read from the SEM photograph is 1.00-1.10, when the volume-based cumulative 50% particle diameter (D50) measured by means of a laser diffraction scattering particle size distribution measurement, is in the range of 3-200 μm.
233) is 22-91 mass% inclusive. A method for manufacturing this spinel powder comprises: a mixing step for mixing a magnesium source, which has a purity of 99.95 mass% or greater, with an aluminum source, which has a purity of 99.95 mass% or greater, to give a mixed powder; a grinding step for grinding the mixed powder to give a precursor; and a firing step for firing the precursor at a temperature of 1500°C or lower.
C21D 6/00 - Traitement thermique des alliages ferreux
C21D 8/12 - Modification des propriétés physiques par déformation en combinaison avec, ou suivie par, un traitement thermique pendant la fabrication d'objets à propriétés électromagnétiques particulières
C21D 9/46 - Traitement thermique, p. ex. recuit, durcissement, trempe ou revenu, adapté à des objets particuliersFours à cet effet pour tôles
H01F 1/147 - Alliages caractérisés par leur composition
23.
Magnesium oxide for annealing separators, and grain-oriented magnetic steel sheet
C21D 1/70 - Revêtements temporaires ou matériaux d'enrobage appliqués avant ou pendant le traitement thermique pendant le chauffage ou la trempe
H01F 1/147 - Alliages caractérisés par leur composition
C21D 8/12 - Modification des propriétés physiques par déformation en combinaison avec, ou suivie par, un traitement thermique pendant la fabrication d'objets à propriétés électromagnétiques particulières
C21D 9/46 - Traitement thermique, p. ex. recuit, durcissement, trempe ou revenu, adapté à des objets particuliersFours à cet effet pour tôles
C21D 9/46 - Traitement thermique, p. ex. recuit, durcissement, trempe ou revenu, adapté à des objets particuliersFours à cet effet pour tôles
C01F 5/22 - Hydroxyde de magnésium à partir de composés du magnésium avec des hydroxydes alcalins ou des oxydes ou hydroxydes alcalino-terreux
C01F 5/08 - Magnésie par décomposition thermique des composés du magnésium par calcination de l'hydroxyde de magnésium
C21D 8/12 - Modification des propriétés physiques par déformation en combinaison avec, ou suivie par, un traitement thermique pendant la fabrication d'objets à propriétés électromagnétiques particulières
C21D 6/00 - Traitement thermique des alliages ferreux
25.
Magnesium oxide for annealing separator, and grain-oriented electromagnetic steel sheet
C01F 5/10 - Magnésie par décomposition thermique des composés du magnésium par décomposition thermique du chlorure de magnésium avec de la vapeur d'eau
C21D 8/02 - Modification des propriétés physiques par déformation en combinaison avec, ou suivie par, un traitement thermique pendant la fabrication de produits plats ou de bandes
C21D 8/12 - Modification des propriétés physiques par déformation en combinaison avec, ou suivie par, un traitement thermique pendant la fabrication d'objets à propriétés électromagnétiques particulières
C22C 38/02 - Alliages ferreux, p. ex. aciers alliés contenant du silicium
C23C 28/04 - Revêtements uniquement de matériaux inorganiques non métalliques
26.
Spherical magnesium oxide and production method therefor
Provided are: a spherical magnesium oxide having not only high sphericity but also smooth surface and having excellent moisture resistance and excellent filling properties, and a method producing the same. In the present invention, by controlling the boron and iron contents of the calcined magnesium oxide to be in the respective predetermined ranges, there is provided a spherical magnesium oxide having a volume-based cumulative 50% particle diameter (D50), as measured by a laser diffraction/scattering particle size distribution measurement, in the range of from 3 to 200 μm, which is the range for a relatively large particle diameter, and a high sphericity of 1.00 to 1.20, as measured from viewing a SEM photomicrograph, as well as smooth surface, and having excellent moisture resistance and excellent filling properties. A predetermined spherical magnesium oxide is provided by virtue of the synergies obtained from the boron content of 300 to 2,000 ppm and the iron content of 100 to 1,500 ppm.
NATIONAL UNIVERSITY CORPORATION CHIBA UNIVERSITY (Japon)
Inventeur(s)
Okada, Shota
Kitagaki, Masaki
Ootsuka, Yasuhiro
Tsutsumi, Keisuke
Ryu, Junichi
Kurosawa, Ryo
Maruyama, Aya
Abrégé
Provided is a chemical heat storage material which stores heat by utilizing a dehydration reaction of a hydroxide of calcium and/or magnesium, and which exhibits higher reaction rate and enables heat storage at lower temperatures. This chemical heat storage material contains both a hydroxide and/or an oxide of calcium and/or magnesium, and a hydroxide of lithium and a chloride of lithium, which serve as lithium compounds. It is preferable that the total amount of the lithium compounds is 0.1-50% by mole relative to the hydroxide and/or the oxide of calcium and/or magnesium.
NATIONAL UNIVERSITY CORPORATION CHIBA UNIVERSITY (Japon)
Inventeur(s)
Okada, Shota
Ryu, Junichi
Abrégé
Provided is a chemical heat storage material which stores heat by utilizing a dehydration reaction of a hydroxide of an alkaline earth metal, while exhibiting higher reaction rate, and which enables heat storage at lower temperatures. A chemical heat storage material according to the present invention contains a hydroxide and/or an oxide of an alkaline earth metal, and an acid salt of a metal. This chemical heat storage material additionally contains a compound of an alkali metal; and it is preferable that the amount of the compound of an alkali metal is 0.1-50% by mole relative to the hydroxide and/or the oxide of an alkaline earth metal. It is also preferable that the amount of the acid salt of a metal is 0.05-30% by mole relative to the hydroxide and/or the oxide of an alkaline earth metal.
C09K 5/16 - Substances sujettes à des réactions chimiques lors de leur utilisation
F28D 20/00 - Appareils ou ensembles fonctionnels d'accumulation de chaleur en généralAppareils échangeurs de chaleur de régénération non couverts par les groupes ou
30.
CHEMICAL HEAT-STORAGE MATERIAL AND METHOD FOR MANUFACTURING SAME, AND CHEMICAL HEAT PUMP AND METHOD FOR OPERATING SAME
NATIONAL UNIVERSITY CORPORATION CHIBA UNIVERSITY (Japon)
Inventeur(s)
Okada, Shota
Ryu, Junichi
Abrégé
Provided is a chemical heat-storage material that stores heat using a dehydration reaction of a hydroxide of an alkaline earth metal, said chemical heat-storage material exhibiting a higher reaction rate and enabling heat storage at a lower temperature. Also provided is a chemical heat pump for using said chemical heat-storage material to store and emit heat. The chemical heat-storage material contains an oxide and/or a hydroxide of an alkaline earth metal, and an acid, the acid content being 0.05–30mol% with respect to the alkaline earth metal. The chemical heat pump (10) uses an endothermic dehydration reaction and an exothermic hydration reaction, and comprises: a reactor (11) that accommodates the chemical heat-storage material (21) containing an oxide and/or hydroxide of an alkaline earth metal; a heat-supply means (12) that is thermally connected to the reactor and supplies heat from outside to the chemical heat-storage material; a heat-recovery means (13) that is thermally connected to the reactor and extracts heat created from the chemical heat-storage material to the outside; a storage tank (14) that stores water (22); a connecting pipe (15) that connects the reactor and the storage tank, and through which water passes; and an acid-supply mechanism (17) that supplies acid into the chemical heat pump.
F28D 20/00 - Appareils ou ensembles fonctionnels d'accumulation de chaleur en généralAppareils échangeurs de chaleur de régénération non couverts par les groupes ou
C09K 5/16 - Substances sujettes à des réactions chimiques lors de leur utilisation
F25B 17/08 - Machines, installations ou systèmes à sorption, à marche discontinue, p. ex. à absorption ou à adsorption l'absorbant ou l'adsorbant étant un solide, p. ex. du sel
31.
SPHERICAL MAGNESIUM OXIDE AND PRODUCTION METHOD THEREFOR
Provided are: a spherical magnesium oxide which has not only a high sphericity but also has a smooth surface and excellent moisture resistance and filling properties; and a production method for the spherical magnesium oxide. Since the boron content and the iron content after firing are adjusted to fall within certain ranges, the present invention provides a spherical magnesium oxide which has filling properties and moisture resistance, which has a smooth surface, and has a sphericity as high as 1.00-1.20 as measured from an SEM photograph, in a relatively large range of volume-based cumulative 50%-particle size (D50) of 3-200 μm as measured by a laser diffraction scattering particle size distribution measurement. Also provided is a predetermined spherical magnesium oxide obtained by an added-amount synergistic effect resulting from setting the boron content to 300-2000 ppm and the iron content to 100-1500 ppm.
Provided is a magnesium oxide-containing spinel powder which is capable of producing a ceramic sintered body that has high strength and excellent strength stability. A magnesium oxide-containing spinel powder which has a 50% particle diameter (D50) of 0.30 to 10.00 μm, and wherein: the ratio of the difference between the 90% particle diameter (D90) and D50 to the difference between D50 and the 10% particle diameter (D10), namely (D90 - D50)/(D50 - D10) is 1.0 to 5.0; and the composition ratios of Mg and Al in terms of oxides, namely the composition ratio of MgO is 50% to 90% by weight and the composition ratio of Al2O3 is 50% to 10% by weight.
The present invention addresses the problem of providing a magnesium oxide for annealing separators for obtaining a grain-oriented magnetic steel sheet having excellent magnetic properties and insulation properties. The present invention for solving this problem is a magnesium oxide for annealing separators, in which the BET specific surface area is 12.0 × 103 to 25.0 × 103 m2⋅kg-1 and the Blaine specific surface area is 2.0 × 103 to 7.0 × 103 m2⋅kg-1.
C23C 22/00 - Traitement chimique de surface de matériaux métalliques par réaction de la surface avec un milieu réactif laissant des produits de réaction du matériau de la surface dans le revêtement, p. ex. revêtement par conversion, passivation des métaux
C01F 5/08 - Magnésie par décomposition thermique des composés du magnésium par calcination de l'hydroxyde de magnésium
C21D 8/12 - Modification des propriétés physiques par déformation en combinaison avec, ou suivie par, un traitement thermique pendant la fabrication d'objets à propriétés électromagnétiques particulières
C21D 9/46 - Traitement thermique, p. ex. recuit, durcissement, trempe ou revenu, adapté à des objets particuliersFours à cet effet pour tôles
H01F 1/147 - Alliages caractérisés par leur composition
34.
MAGNESIUM OXIDE FOR ANNEALING SEPARATOR, AND GRAIN-ORIENTED ELECTROMAGNETIC STEEL SHEET
The present invention addresses the problem of providing magnesium oxide for annealing separators which is for obtaining grain-oriented electromagnetic steel sheets excellent in terms of magnetic property and insulating property. The present invention for solving the problem is magnesium oxide for annealing separators which has a Blaine specific surface area of 2.5×103 to 7.0×103 m2·kg-1 and a CAA of 50-170 seconds.
C21D 8/12 - Modification des propriétés physiques par déformation en combinaison avec, ou suivie par, un traitement thermique pendant la fabrication d'objets à propriétés électromagnétiques particulières
C01F 5/08 - Magnésie par décomposition thermique des composés du magnésium par calcination de l'hydroxyde de magnésium
C21D 9/46 - Traitement thermique, p. ex. recuit, durcissement, trempe ou revenu, adapté à des objets particuliersFours à cet effet pour tôles
C23C 22/00 - Traitement chimique de surface de matériaux métalliques par réaction de la surface avec un milieu réactif laissant des produits de réaction du matériau de la surface dans le revêtement, p. ex. revêtement par conversion, passivation des métaux
H01F 1/147 - Alliages caractérisés par leur composition
35.
CHEMICAL HEAT STORAGE GRANULES AND PRODUCTION PROCESS THEREFOR
NATIONAL UNIVERSITY CORPORATION CHIBA UNIVERSITY (Japon)
Inventeur(s)
Ryu Junichi
Ootsuka Yasuhiro
Okada Shota
Abrégé
Provided are chemical heat storage granules which undergo dehydration/endothermic reaction in the low-temperature range of 100-350°C and have high strength. The chemical heat storage granules are configured of, as major components, at least one compound selected from among the oxide of magnesium, the hydroxide of magnesium, composite oxides of magnesium, and composite hydroxides of magnesium, at least one compound selected from among lithium compounds, potassium compounds, and sodium compounds, and a carbon compound, and are characterized in that in the case where the chemical heat storage granules have a carbon content of 12-35 mass%, the chemical heat storage granules have excellent susceptibility to dehydration/endothermic reaction in the low-temperature range of 100-350°C and show excellent durability, in cases when the content of Li, K, and/or Na with respect to the Mg contained in the chemical heat storage granules is in the range of 0.1-50 mol% and when the composite oxides of magnesium and composite hydroxides of magnesium each contain at least one element selected from among Ni, Co, Cu, and Al in an amount in the range of 1-40 mol% with respect to the Mg.
C09K 5/16 - Substances sujettes à des réactions chimiques lors de leur utilisation
F28D 20/00 - Appareils ou ensembles fonctionnels d'accumulation de chaleur en généralAppareils échangeurs de chaleur de régénération non couverts par les groupes ou
36.
MAGNESIUM OXIDE FOR ANNEALING SEPARATORS, AND GRAIN-ORIENTED MAGNETIC STEEL SHEET
The present invention addresses the problem of providing a magnesium oxide for annealing separators for obtaining a grain-oriented magnetic steel sheet having excellent magnetic properties and insulation properties. The present invention for solving this problem is a magnesium oxide for annealing separators, in which, on a graph illustrating the relationship between the adsorbed water content and the water of hydration content, the adsorbed water content and the water of hydration content fall within a square range having points a to d as the vertices. a: adsorbed water content of 0.25 mass%, water of hydration content of 0.1 mass%; b: adsorbed water content of 0.60 mass%, water of hydration content of 0.1 mass%; c: adsorbed water content of 0.40 mass%, water of hydration content of 6.0 mass%; d: adsorbed water content of 0.20 mass%, water of hydration content of 6.0 mass%.
C21D 9/46 - Traitement thermique, p. ex. recuit, durcissement, trempe ou revenu, adapté à des objets particuliersFours à cet effet pour tôles
C01F 5/08 - Magnésie par décomposition thermique des composés du magnésium par calcination de l'hydroxyde de magnésium
C21D 8/12 - Modification des propriétés physiques par déformation en combinaison avec, ou suivie par, un traitement thermique pendant la fabrication d'objets à propriétés électromagnétiques particulières
C23C 22/00 - Traitement chimique de surface de matériaux métalliques par réaction de la surface avec un milieu réactif laissant des produits de réaction du matériau de la surface dans le revêtement, p. ex. revêtement par conversion, passivation des métaux
H01F 1/16 - Aimants ou corps magnétiques, caractérisés par les matériaux magnétiques appropriésEmploi de matériaux spécifiés pour leurs propriétés magnétiques en matériaux inorganiques caractérisés par leur coercivité en matériaux magnétiques doux métaux ou alliages sous forme de feuilles
H01F 1/18 - Aimants ou corps magnétiques, caractérisés par les matériaux magnétiques appropriésEmploi de matériaux spécifiés pour leurs propriétés magnétiques en matériaux inorganiques caractérisés par leur coercivité en matériaux magnétiques doux métaux ou alliages sous forme de feuilles avec revêtement isolant
37.
MAGNESIUM OXIDE FOR ANNEALING SEPARATORS, AND GRAIN-ORIENTED MAGNETIC STEEL SHEET
The present invention addresses the problem of providing a magnesium oxide for annealing separators for obtaining a grain-oriented magnetic steel sheet having excellent magnetic properties and insulation properties. The present invention for solving this problem is a magnesium oxide for annealing separators, in which the sulfur content is 0.1 to 0.5 mass% and the aggregation degree RBlaine/RBET, which is the ratio of the particle diameter RBlaine calculated from the Blaine specific surface area to the particle diameter RBET calculated from the BET specific surface area, is 3.0 to 5.5.
C21D 8/12 - Modification des propriétés physiques par déformation en combinaison avec, ou suivie par, un traitement thermique pendant la fabrication d'objets à propriétés électromagnétiques particulières
C01F 5/08 - Magnésie par décomposition thermique des composés du magnésium par calcination de l'hydroxyde de magnésium
C21D 9/46 - Traitement thermique, p. ex. recuit, durcissement, trempe ou revenu, adapté à des objets particuliersFours à cet effet pour tôles
C23C 22/00 - Traitement chimique de surface de matériaux métalliques par réaction de la surface avec un milieu réactif laissant des produits de réaction du matériau de la surface dans le revêtement, p. ex. revêtement par conversion, passivation des métaux
H01F 1/147 - Alliages caractérisés par leur composition
Provided are: an oxygen-generating composition which enables the distribution of oxygen in water in a well-balanced manner to thereby provide a stable water environment that does not become cloudy even when the oxygen-generating composition contains calcium peroxide at a small content; and a method for producing the oxygen-generating composition. An oxygen-generating composition which comprises a molded article comprising 2 to 20 wt% of calcium peroxide, 2 to 30 wt% of calcium carbonate, 2 to 30 wt% of calcium hydroxide and 30 to 80 wt% of calcium dihydrogen phosphate, wherein the outer shape of the molded article has a surface area of 500 × 10-6 to 3000 × 10-6 m2 and an aspect ratio of 1.0 to 4.5; and a method for producing the oxygen-generating composition.
Provided is an oxygen-generating composition capable of yielding a sufficient oxygen release rate and maintaining a stable water quality environment even at a low calcium peroxide content. Also provided is a method for manufacturing the oxygen-generating composition. An oxygen-generating composition comprising a molded article containing 2-20% calcium peroxide, 2-30% calcium carbonate, 2-30% calcium hydroxide, and 30-80% calcium dihydrogenphosphate, wherein the oxygen-generating composition is characterized in that the calcium dihydrogenphosphate contains from 10% to 40%, as calculated in terms of the weight of the calcium dihydrogenphosphate, of calcium dihydrogenphosphate particles having a mean particle diameter of 150×10‒6‒800×10‒6m and a maximum particle diameter of less than 106×10‒6m. Also, a method for manufacturing the oxygen-generating composition.
A01K 63/04 - Agencements pour traiter l'eau spécialement conçus pour les récipients pour poissons vivants
C01B 25/32 - Phosphates de magnésium, de calcium, de strontium ou de baryum
40.
ROD-LIKE MAGNESIUM HYDROXIDE PARTICLE AND ROD-LIKE MAGNESIUM OXIDE PARTICLE EACH HAVING HIGH SPECIFIC SURFACE AREA, AND METHODS RESPECTIVELY FOR PRODUCING SAID PARTICLES
Provided are: a magnesium hydroxide particle and a magnesium oxide particle, each of which has a high specific surface area; and methods respectively for producing the particles. A magnesium hydroxide particle and a magnesium oxide particle, each of which has a rod-like shape formed by the aggregation of scale-like primary particles, also has a volume cumulative 50% particle diameter (D50) of 1.0 to 10.0 μm as measured by a laser diffraction scattering particle size distribution measurement method, and also has a specific surface area of 10 m2/g or more.
C01F 5/16 - Hydroxyde de magnésium par traitement de la magnésie, p. ex. dolomite calcinée, avec de l'eau ou des solutions de sels ne contenant pas de magnésium
C01F 5/08 - Magnésie par décomposition thermique des composés du magnésium par calcination de l'hydroxyde de magnésium
41.
COATED MAGNESIUM OXIDE POWDER, AND METHOD FOR PRODUCING SAME
Provided is a coated magnesium oxide powder which has excellent heat conductivity and moisture resistance, can exhibit an excellent filling property when used as a filler for a resin, and can be filled into a resin composition to impart high fluidability to the resin composition and therefore impart excellent moldability to the resin composition. A coated magnesium oxide powder comprising a magnesium oxide powder and a coating layer formed on at least a part of the surface of the powder and comprising a magnesium-phosphate-type compound, wherein the magnesium oxide powder has a particle internal void volume of 0.3 to 0.8 cm3/g, a mode diameter of 0.2 to 1.0 μm and an inflection point diameter of 0.9 μm or more in a mercury intrusion pore size distribution, and wherein the content of phosphorus in the coated magnesium oxide powder is 0.1 to 10 mass%.
Provided are: a magnesium hydroxide particle that emits little α-rays and shows excellent flowability and dispersibility when added to a resin; a resin composition containing the magnesium hydroxide particle; and a method for manufacturing the same. A magnesium hydroxide particle that is a hexagonal column-shaped particle, the external shape of a crystal of which consists of two (i.e., top and bottom) hexagonal base planes, said base planes being parallel to each other, and six outer peripheral column planes formed between these basal planes, wherein the hexagonal column-shaped particle has a length in the c-axial direction of 0.5-6.0 μm, the length in the c-axial direction corresponds to at least 50% of the average particle diameter of the hexagonal column-shaped particle, the α-ray emitting quantity is 0.020 c/cm2/h or less, and the purity is 98.0% or more, and a method for manufacturing the same.
Provided are: composite metal hydroxide particles characterized by being represented by formula (I), Mg1-xZnx(OH)2 (in the formula, x is such that 0.01 ≤ x < 0.5), having an inflection point diameter of 0.3-0.6 μm, and an inter-particle gap of 0.9×10-3-1.3×103 m3·kg-1; and a resin composition containing same.
Provided are: magnesium hydroxide particles that have a purity of at least 98 mass%, are hexagonal prism particles of which the outer crystal shape comprises two hexagonal base surfaces at the top and the bottom that are parallel to each other and six outer peripheral prismatic surfaces formed between the base surfaces, and are characterized by the size along the c-axis of the hexagonal prism particles being 0.5-1.5 μm, the size in the c-axis direction being at least 60% of the median particle size of the hexagonal prism particles, the inflection point diameter being 0.1-0.4 μm, and the inter-particle gap being 0.6×10-3-1.0×10-3 m3·kg-1; and a resin composition containing the magnesium hydroxide particles.
C08G 59/00 - Polycondensats contenant plusieurs groupes époxyde par moléculeMacromolécules obtenues par réaction de polycondensats polyépoxydés avec des composés monofonctionnels à bas poids moléculaireMacromolécules obtenues par polymérisation de composés contenant plusieurs groupes époxyde par molécule en utilisant des agents de durcissement ou des catalyseurs qui réagissent avec les groupes époxyde
C08K 3/00 - Emploi de substances inorganiques en tant qu'adjuvants
Provided is a method for manufacturing a key switch by which a key top and a plunger are formed as a single unit at both sides of a film. According to the present invention, a first forming die (5) is prepared which comprises a first molding depression (7) for forming a key top (2). An ultraviolet curing resin (10) is filled in the first molding depression (7), and then a light-permeable base material film (1) is placed thereon. The key top (2) is formed at one side of the base material film (1) by irradiation through the base material film (1). A non-light permeable print layer (3) is formed at the other side of the base material film (1) where the key top (2) is formed, and a light-permeable second forming die (6) is prepared which comprises a second molding depression (8) for forming a plunger (4). After filling the ultraviolet curing resin (10) in the second molding depression (8), the base material film (1) where the key top (2) is formed is placed thereon, and light is applied through the second forming die (6) so that the plunger (4) is formed at a surface of the base material film (1) where the print layer is formed.
Provided are spherical magnesium hydroxide particles and magnesium oxide particles having a large specific surface area, as well as a method for producing the same. The magnesium hydroxide particles and magnesium oxide particles are spherical particles that are obtained when scale-like primary particles aggregate. The particles have a volume-cumulative 50% grain diameter (D50) as determined by laser diffraction scattering-type sizing that is between 1.0 and 5.0 µm and a specific surface area of 10 m2/g or higher.
C01F 5/16 - Hydroxyde de magnésium par traitement de la magnésie, p. ex. dolomite calcinée, avec de l'eau ou des solutions de sels ne contenant pas de magnésium
C01F 5/08 - Magnésie par décomposition thermique des composés du magnésium par calcination de l'hydroxyde de magnésium
48.
PROCESS FOR PRODUCING SINTERED MAGNESIUM OXIDE MATERIAL
Provided is a production process which can produce a sintered magnesium oxide material containing magnesium oxide, calcium oxide and aluminum and having a sufficiently high sintered density from a magnesium oxide precursor in which aluminum is dispersed uniformly. A process for producing a sintered magnesium oxide material containing magnesium oxide, calcium oxide and aluminum. In the process, firstly, a magnesium hydroxide slurry containing aluminum is prepared, the magnesium hydroxide slurry is subjected to a hydrothermal treatment, the treatment product is subjected to filtering, washing with water and drying to produce magnesium hydroxide particles, and the magnesium hydroxide particles are fired, thereby producing magnesium oxide particles. Next, the magnesium oxide particles are mixed with calcium compound particles and a binder, the mixture is granulated to produce a granulated powder, the granulated powder is molded in a mold to produce a molding, and the molding is sintered, thereby producing the sintered material.
C04B 35/04 - Produits céramiques mis en forme, caractérisés par leur compositionCompositions céramiquesTraitement de poudres de composés inorganiques préalablement à la fabrication de produits céramiques à base d'oxydes à base d'oxyde de magnésium, d'oxyde de calcium ou de mélanges d'oxydes dérivés de la dolomite à base d'oxyde de magnésium
The purpose of the present invention is to provide a spherical magnesium hydroxide particle and magnesium oxide particle having excellent dispersion properties, and to provide a method for producing the same. Provided are a magnesium hydroxide particle and magnesium oxide particle having a spherical shape in which flake-shaped primary particles are aggregated, the pore distribution having a mode volume of at least 1.4 mL/mg and a mode diameter of at least 0.4 µm.
C01F 5/16 - Hydroxyde de magnésium par traitement de la magnésie, p. ex. dolomite calcinée, avec de l'eau ou des solutions de sels ne contenant pas de magnésium
C01F 5/08 - Magnésie par décomposition thermique des composés du magnésium par calcination de l'hydroxyde de magnésium
50.
FLUORINE-CONTAINING MAGNESIUM OXIDE LIGHT-EMITTING BODY AND METHOD FOR PRODUCING SAME
Provided is a fluorine-containing magnesium oxide light-emitting body having an ultraviolet light emission strength that is at least at the level of that of magnesium oxide containing more than 100 ppm of fluorine, despite containing less than 100 ppm of fluorine. The magnesium oxide light-emitting body has a light-emission peak in the ultraviolet region of 200-300 nm on the basis of excitation by an electron beam or ultraviolet rays, has an amount of contained fluorine with respect to magnesium of less than 100 ppm, and has a light-emission peak strength ratio with respect to the reflection peak (wavelength around 980 nm) of the excitation-light lamp of at least 20. The light-emitting body can be obtained by adding to a magnesium oxide precursor a fluorine compound at an amount resulting in 0.06-1.25 mol% of fluorine with respect to magnesium, firing, temporarily cooling, and then reheating.
C04B 35/04 - Produits céramiques mis en forme, caractérisés par leur compositionCompositions céramiquesTraitement de poudres de composés inorganiques préalablement à la fabrication de produits céramiques à base d'oxydes à base d'oxyde de magnésium, d'oxyde de calcium ou de mélanges d'oxydes dérivés de la dolomite à base d'oxyde de magnésium
C09K 11/08 - Substances luminescentes, p. ex. électroluminescentes, chimiluminescentes contenant des substances inorganiques luminescentes
C09K 11/55 - Substances luminescentes, p. ex. électroluminescentes, chimiluminescentes contenant des substances inorganiques luminescentes contenant du béryllium, du magnésium, des métaux alcalins ou métaux alcalino-terreux
H01J 11/22 - Électrodes, p. ex. forme, matériau ou configuration particuliers
H01J 11/34 - Enceintes, récipients ou leurs parties constitutives, p. ex. substrats
51.
MAGNESIUM HYDROXIDE MICROPARTICLES, MAGNEXIUM OXIDE MICROPARTICLES, AND METHOD FOR PRODUCING EACH
Highly pure magnesium hydroxide microparticles and highly pure magnesium oxide microparticles that are even and have a small particle size are provided. Regarding the magnesium hydroxide microparticles, the BET specific surface area is at least 5 m2/g, the volume-based cumulative 50% particle diameter (D50) resulting from laser diffraction scattering measurement of the particle size distribution is 0.1-0.5 µm, the ratio D90/D10 between the volume-based cumulative 90% particle diameter (D90) and the volume-based cumulative 10% particle diameter (D10) resulting from laser diffraction scattering measurement of the particle size distribution is no greater than 10, and the purity is at least 99.5 mass%. Regarding the magnesium oxide microparticles, the BET specific surface area is at least 5 m2/g, the volume-based cumulative 50% particle diameter (D50) resulting from laser diffraction scattering measurement of the particle size distribution is 0.1-0.5 µm, the ratio D90/D10 between the volume-based cumulative 90% particle diameter (D90) and the volume-based cumulative 10% particle diameter (D10) resulting from laser diffraction scattering measurement of the particle size distribution is no greater than 10, and the purity is at least 99.5 mass%.
Disclosed are: a sintered magnesium oxide material which enables the prevention of occurrence of splashing during the formation of a film and rarely causes clogging at a supply inlet of a film formation device; a deposition material for a PDP-protecting film, which comprises the sintered magnesium oxide material; and a process for producing the sintered material. Specifically disclosed is a sintered magnesium oxide material which comprises magnesium oxide, 3 to 50 mass% of an oxide of an element belonging to Group 2A on the periodic table and different from magnesium, and optionally 1000 ppm or less of at least one element selected from the group consisting of aluminum, yttrium, cerium, zirconium, scandium and chromium, and which has a disk-like, elliptical-plate-like, polygonal-plate-like or half-moon-like shape or a cubic or rectangular solid shape having rounded apexes.
C04B 35/04 - Produits céramiques mis en forme, caractérisés par leur compositionCompositions céramiquesTraitement de poudres de composés inorganiques préalablement à la fabrication de produits céramiques à base d'oxydes à base d'oxyde de magnésium, d'oxyde de calcium ou de mélanges d'oxydes dérivés de la dolomite à base d'oxyde de magnésium
Disclosed is a method for obtaining magnesium oxide powder which has excellent dispersion properties, a small average particle diameter, a uniform particle diameter and which does not include micro-size particles. The particles of the magnesium oxide powder have: a BET specific surface area of 5m2/g or higher; a 50% cumulative particle diameter (D50) of 0.3-1.5μm, as determined by laser diffraction scattering particle size distribution measurement; a D90/D10 ratio of 5 or less, where D10 is the 10% cumulative particle diameter and D90 is the 90% cumulative particle diameter as determined by laser diffraction scattering particle size distribution measurement; and D10 is 0.1μm or higher.
Magnesium oxide powders having a large diameter of crystallite, and having a favorable crystallinity are provided. Magnesium oxide powders: having peak widths at half-height of the peaks on a (111) plane, a (200) plane and a (220) plane of each no greater than 0.20 degrees as determined with a powder X-ray diffraction method carried out using a Cu—Kα ray; and having a crystallite diameter of no less than 700 Å.
The object is to provide a high-purity magnesium oxide particle aggregate that is redispersible and can be supplied with keeping high purity, and a method for producing the same.
A magnesium oxide particle aggregate that is an aggregate of magnesium oxide particles, wherein the magnesium oxide particles have an average particle size of 1 μm or less, and comprises Si, Al, Ca, Fe, V, Cr, Mn, Ni, Zr, B and Zn as impurities in their respective amounts of 10 ppm by mass or less, wherein the total amount of the impurities is 100 ppm by mass or less.
B32B 5/16 - Produits stratifiés caractérisés par l'hétérogénéité ou la structure physique d'une des couches caractérisés par le fait qu'une des couches est formée de particules, p. ex. de copeaux, de fibres hachées, de poudre
56.
MAGNESIUM OXIDE PARTICLE AGGREGATE, AND METHOD FOR PRODUCTION THEREOF
Disclosed is a highly pure magnesium oxide particle aggregate which can be redispersed and can be delivered while keeping its purity at a high level. Also disclosed is a method for producing the magnesium oxide particle aggregate. The magnesium oxide particle aggregate comprises an aggregate of a magnesium oxide particle, wherein the magnesium oxide particle has an average particle diameter of 1 &mgr;m or smaller and contains Si, Al, Ca, Fe, V, Cr, Mn, Ni, Zr, B and Zn each in an amount of 10 ppm by mass or less as impurities, and wherein the mass-based ratio of the total amount of the impurities relative to the total amount of the particle is 100 ppm by mass or less.
The invention provides a magnesium oxide powder which has large crystallite diameters and excellent crystallinity. A magnesium oxide powder which exhibits half widths of peaks of (111), (200) and (220) planes of 0.20 degree or below respectively in the powder X-ray diffractometry with Cu-Kα radiation and has crystallite diameters of 700 Å or above.
Disclosed is an oxide luminophor which emits a high-level light in an ultraviolet region of 200-300 nm when excited by an electron ray or an ultraviolet ray. Specifically disclosed is a luminophor which is composed of an oxide of group 2A element of the periodic table containing another metal element or a semi-metal element, and has an emission peak in an ultraviolet region of 200-300 nm when excited by an electron ray or an ultraviolet ray. Preferably, the ratio of the another metal element or the semi-metal element relative to the group 2A element of the periodic table is 0.0001-1% by mole, the group 2A element of the periodic table is Mg, and the another metal element is Al.
C09K 11/55 - Substances luminescentes, p. ex. électroluminescentes, chimiluminescentes contenant des substances inorganiques luminescentes contenant du béryllium, du magnésium, des métaux alcalins ou métaux alcalino-terreux
Disclosed is a magnesium oxide powder having a cubic shape and a large average particle diameter. Also disclosed is a method for producing such a magnesium oxide powder. Specifically disclosed is a magnesium oxide powder whose particles have a cubic shape when observed with a scanning electron microscope. This magnesium oxide powder has a 50% cumulative particle diameter (D50), as determined by a laser diffraction/scattering particle size distribution measuring method, of not less than 1.0 &mgr;m. This powder can be obtained by firing a magnesium oxide precursor in the presence of 0.5-30% by mass of a halide ion relative to the total mass of the precursor in a closed system.
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