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

1991-03-25

1992-06-02

Bell, Mark L.

Plastic and nonmetallic article shaping or treating: processes

Including step of generating heat by friction

501 87, C04B 3548, C04B 3556

Patent

active

051184575

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
patent: 4774041 (1988-09-01), Tsukuma et al.

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