Silicon nitride sintered bodies and a method for producing...

Details Silicon nitride sintered bodies and a method for producing... Silicon nitride sintered bodies and a method for producing...

C - Chemistry, Metallurgy

04

B

261/27

C04B 35/58 (2006.01) C04B 35/584 (2006.01)

Patent

CA 1201731

ABSTRACT OF THE DISCLOSURE Silicon nitride sintered bodies having high density, mechanical strength and fracture toughness, which contain the given amounts of oxides or oxynitrides of Sr, Mg, a rare earth element and Zr respectively and the remainder of Si3N4, are produced by shaping a raw batch material containing compounds of each of Sr, Mg, a rare earth element and Zr in the given amounts respec- tively as a sintering aid and the remainder of silicon nitride powder and pressureless sintering the shaped body in nitrogen or an inert gas atmosphere.

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