Colored zirconia ceramics and process for preparation thereof

Details Colored zirconia ceramics and process for preparation thereof Colored zirconia ceramics and process for preparation thereof

1988-04-14

1991-10-22

Bell, Mark L.

Compositions: ceramic

Ceramic compositions

Carbide or oxycarbide containing

501103, 501104, C04B 3548, C04B 3556

Patent

active

050595628

ABSTRACT:
Disclosed is colored, partially stabilized zirconia ceramics containing a colorant component and a stabilizer, wherein the zirconia ceramics contains 0.05 to 15% by weight of zirconium carbide based on the entire ceramics, the content of free carbon is lower than 0.1% by weight, and the crystal phase of the zirconia is composed of tetragonal crystals.
This colored, partially stabilized zirconia ceramics is prepared by a process comprising molding a composition comprising 0.1 to 10 parts by weight of a colorant component and 90 to 99.9 parts by weight of zirconia and a stabilizer into a molded body having a predetermined shape, sintering the molded body, and sintering the obtained sintered body in a carbon atmosphere to form ceramics containing 0.05 to 15% by weight of zirconium carbide, in which the crystal phase of zirconia is composed of tetragonal crystals.

REFERENCES:
patent: 4656145 (1987-04-01), Soroi

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