Process for producing platelet .alpha.-Al.sub.2 O.sub.3 based ce

Details Process for producing platelet .alpha.-Al.sub.2 O.sub.3 based ce Process for producing platelet .alpha.-Al.sub.2 O.sub.3 based ce

1994-08-03

1997-11-11

Group, Karl

Compositions: ceramic

Ceramic compositions

Refractory

501105, 264 65, C04B 35111

Patent

active

056863667

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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