Spherical alumina powder
AssigneeDenka Company Limited
InventorsJunya NITTA, Teruhiro AIKYO
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Abstract
A spherical alumina powder is provided in which, when a sphericity of the powder having a particle diameter of 5 μm or more and less than 10 μm is defined as S1, a sphericity of the powder having a particle diameter of 10 μm or more and less than 20 μm is defined as S2, a sphericity of the powder having a particle diameter of 20 μm or more and less than 30 μm is defined as S3, a sphericity of the powder having a particle diameter of 30 μm or more and less than 45 μm is defined as S4, and a sphericity of the powder having a particle diameter of 45 μm or more is defined as S5 in a measurement using a wet-flow-type image analyzer, at least two or more of S1, S2, S4, and S5 are 0.85 or more, and S3 is 0.84 or less.
Claims6
A spherical alumina powder in which, in a case where a sphericity of the spherical alumina powder having a particle diameter of 5 μm or more and less than 10 μm is defined as S1, a sphericity of the spherical alumina powder having a particle diameter of 10 μm or more and less than 20 μm is defined as S2, a sphericity of the spherical alumina powder having a particle diameter of 20 μm or more and less than 30 μm is defined as S3, a sphericity of the spherical alumina powder having a particle diameter of 30 μm or more and less than 45 μm is defined as S4, and a sphericity of the spherical alumina powder having a particle diameter of 45 μm or more is defined as S5 in a measurement using a wet flow type image analyzer, at least two or more of S1, S2, S4, and S5 are 0.85 or more, and S3 is 0.84 or less.
Dependencies are inferred from the claim text.