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公开(公告)号：US20190300377A1
公开(公告)日：2019-10-03
申请号：US16335489
申请日：2017-09-26
IPC分类号： C01F7/16
摘要： Provided is a magnesium oxide-containing spinel powder capable of producing a ceramic sintered body having high strength and excellent strength stability. In the magnesium oxide-containing spinel powder, a 50% particle diameter (D50) is 0.30 to 10.00 μm, a ratio (D90-D50)/(D50-D10) of a difference between a 90% particle diameter (D90) and the 50% particle diameter (D50) and a difference between the 50% particle diameter (D50) and a 10% particle diameter (D10) is 1.0 to 5.0, and a composition ratio of Mg and Al in terms of an oxide equivalent content is 50 to 90% by weight of MgO and 10 to 50% by weight of Al2O3.
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2.发明公开公开(公告)号：US20230257554A1
公开(公告)日：2023-08-17
申请号：US18025212
申请日：2021-09-14
发明人： Shuji SASAKI , Junichi NAKAZONO , Shotaro TANOUE , Yoshihisa OSAKI , Tomoaki CHIKAZAWA , Miki YAMAMOTO
CPC分类号： C08K7/18 , C01F5/02 , C08K3/22 , C08K2201/003 , C08K2003/222 , C01P2004/32 , C01P2006/32
摘要： 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.
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公开(公告)号：US20220219999A1
公开(公告)日：2022-07-14
申请号：US17593958
申请日：2020-03-27
摘要： 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.
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公开(公告)号：US20210309833A1
公开(公告)日：2021-10-07
申请号：US17268071
申请日：2020-03-27
摘要： 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.
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5.发明公开公开(公告)号：US20240010899A1
公开(公告)日：2024-01-11
申请号：US18025251
申请日：2021-09-14
发明人： Shuji SASAKI , Junichi NAKAZONO , Shotaro TANOUE , Yoshihisa OSAKI , Tomoaki CHIKAZAWA , Miki YAMAMOTO
CPC分类号： C09K5/14 , C01F5/08 , C08K3/22 , C01P2006/32 , C01P2004/03 , C08K2003/222 , C08K2003/2227 , C08K2201/001 , C08K2201/005
摘要： 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.
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6.发明公开公开(公告)号：US20230357620A1
公开(公告)日：2023-11-09
申请号：US18026415
申请日：2021-09-14
发明人： Shuji SASAKI , Junichi NAKAZONO , Shotaro TANOUE , Yoshihisa OSAKI , Tomoaki CHIKAZAWA , Miki YAMAMOTO
CPC分类号： C09K5/14 , C01F5/02 , C08K3/22 , C01P2006/19 , C01P2004/03 , C01P2006/32 , C08K2003/222 , C08K2003/2227 , C08K2201/005
摘要： 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.
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