Platelet .alpha.-Al.sub.2 O.sub.3 based ceramic composite

Details Platelet .alpha.-Al.sub.2 O.sub.3 based ceramic composite Platelet .alpha.-Al.sub.2 O.sub.3 based ceramic composite

1993-04-19

1995-04-04

Group, Karl

Compositions: ceramic

Ceramic compositions

Refractory

501 89, 501105, 51309, C04B 3510

Patent

active

054037956

ABSTRACT:
A platelet .alpha.-Al.sub.2 O.sub.3 based ceramic composite consists of Al.sub.2 O.sub.3 powder, promoters and controllers. The composite is prepared by mixing aluminum oxide powder with promoters and controllers. The mixture is shaped and sintered to form an object. In one embodiment of the invention, the promoters are either salts or oxides of alkaline metals and alkaline earth metals. The salts are oxidized during sintering.

REFERENCES:
patent: 4331048 (1982-05-01), Dworak et al.
patent: 4829028 (1989-05-01), Seki et al.
patent: 5277702 (1994-01-01), Thibault et al.

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