Process for producing spherical aluminum nitride powder and spherical aluminum nitride powder produced by the same process
AssigneeTokuyama Corporation
InventorsKazutaka Watanabe, Takehiko Yoneda
Life of this patent
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Abstract
[Problems] To provide a process capable of efficiently producing a spherical aluminum nitride powder having a size most suited for use as a filler, and having a high sphericalness and a large particle strength. [Means for Solution] A spherical aluminum nitride powder is produced by using a spherical granulated product of an alumina powder or an alumina hydrate powder as a starting material, and feeding the spherical granulated product to the step of reductive nitrogenation so as to be reductively nitrogenated.
Claims7
A process for producing a spherical aluminum nitride powder by using a spherical granulated product of an alumina powder or an alumina hydrate powder as a starting material, and feeding said spherical granulated product to the step of reductive nitrogenation so as to be reductively nitrogenated.
A spherical aluminum nitride powder comprising a particles having a sphericalness of not less than 0.8 on the average and a strength against the crushing of not less than 100 MPa, said spherical aluminum nitride powder having an average particle size (D50) in a range of 10 to 200 μm and a BET specific surface area in a range of 0.5 to 20 m2/g.
Dependencies are inferred from the claim text.