Sintered body of silicon nitride and composite sintered body of

Details Sintered body of silicon nitride and composite sintered body of Sintered body of silicon nitride and composite sintered body of

1996-04-05

1997-04-08

Group, Karl

Compositions: ceramic

Ceramic compositions

Carbide or oxycarbide containing

501 97, 501 98, C04B 35596, C04B 35599

Patent

active

056187688

ABSTRACT:
A silicon nitride sintered body formed by sintering a mixture of silicon nitride powder mixed with a combined sintering aid of aluminum nitride powder and a powder of at least one rare earth oxide selected from the group consisting of Ce.sub.2 O.sub.3, Pr.sub.2 O.sub.3, Nd.sub.2 O.sub.3, Dy.sub.2 O.sub.3, Ho.sub.2 O.sub.3, Er.sub.2 O.sub.3, Tm.sub.2 O.sub.3, Yb.sub.2 O.sub.3 and Lu.sub.2 O.sub.3. Another sintered body is a composite sintered body of silicon nitride and silicon carbide formed by sintering a mixture of silicon nitride, silicon carbide, aluminum nitride and at least one rare earth oxide selected from the group consisting of Ce.sub.2 O.sub.3, Pr.sub.2 O.sub.3, Nd.sub.2 O.sub.3, Ho.sub.2 O.sub.3, Er.sub.2 O.sub.3, Tm.sub.2 O.sub.3, Yb.sub.2 O.sub.3 and Lu.sub.2 O.sub.3.

REFERENCES:
patent: 4826791 (1989-05-01), Mehrotra et al.
patent: 5177038 (1993-01-01), Takahashi et al.
patent: 5352641 (1994-10-01), Matsui et al.
patent: 5494866 (1996-02-01), Li
patent: 5523267 (1996-06-01), Tanaka et al.

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