Process for producing dense ceramic product

Details Process for producing dense ceramic product Process for producing dense ceramic product

1996-09-19

1999-01-05

Fiorilla, Christopher A.

Plastic and nonmetallic article shaping or treating: processes

Outside of mold sintering or vitrifying of shaped inorganic...

Including plural heating steps

264674, 264682, C04B 3700

Patent

active

058558411

ABSTRACT:
A process for the production of dense polycrystalline silicon carbide shaped articles, includes the steps: (a) heating a powder compact containing silicon carbide and alumina or a precursor thereof together with a secondary sintering assist, to an intermediate temperature for an extended dwell, and then (b) heating the product of step (a) to a higher temperature for sufficient time to produce a dense polycrystalline silicon carbide product. The secondary sintering assist includes one or more rare earths or their precursors, for example scandia, yttria or dysprosia.

REFERENCES:
patent: 4564490 (1986-01-01), Omori et al.
patent: 4569921 (1986-02-01), Omori et al.
patent: 4829027 (1989-05-01), Cutler et al.
International Search Report, International Application No. PCT/AU92/00676.

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