US 6,632,761 B1Granted

Silicon carbide powder, method of producing a green body, and method of producing a sintered silicon carbide

AssigneeBridgestone Corporation

InventorsKazuhiro Ushita, Fumio Odaka, Yoshitomo Takahashi

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Abstract

A silicon carbide powder which can increase the densities of a green body and a sintered silicon carbide, a method of producing a green body having a high density and excellent handling properties, and a method of producing a sintered silicon carbide having a high density, in which methods the silicon carbide powder is used. The silicon carbide powder includes at a particulate volume ratio of 20% to 80% a silicon carbide powder whose model ratio is 1.7 μm to 2.7 μm and a silicon carbide powder whose model ratio is 10.5 μm to 21.5 μm. The silicon carbide powder is used in the method of producing a green body and in the method of producing a sintered silicon carbide powder.

Claims15

Dependent claims

A silicon carbide powder comprising a silicon carbide powder (A) which has a modal diameter of 1.7 to 2.7 μm and a silicon carbide powder (B) which has a modal diameter of 10.5 to 21.5 μm, at a particulate volume ratio (the volume of silicon carbide powder (A)/the volume of silicon carbide powder (A) and the volume of silicon carbide powder (B)) of 20% to 80%, wherein

a ratio (D90/D10) of a cumulative diameter that accounts for 90% of all volume of powder (D90) to a cumulative diameter that accounts for 10% of all volume of powder (D10) calculated according to particle size distribution in the silicon carbide powder (A) is 10 or less, and
a ratio (D90/D10) of a cumulative diameter that accounts for 90% of all volume of powder (D90) to a cumulative diameter that accounts for 10% of all volume of powder (D10) calculated according to particle size distribution in the silicon carbide powder (B) is 10 or less.

Dependencies are inferred from the claim text.