Zirconia type black decorative article and process for productio

Details Zirconia type black decorative article and process for productio Zirconia type black decorative article and process for productio

1983-12-23

1987-04-07

Derrington, James

Compositions: ceramic

Ceramic compositions

Synthetic precious stones

264 60, 264 65, 264 67, 501103, 501104, C04B 3548

Patent

active

046561455

ABSTRACT:
Disclosed is a process for the production of a zirconia type black decorative article which comprises sintering an unsintered molded body comprising a matrix composed mainly of zirconia and at least one stabilizer contained in the matrix, said stabilizer being selected from Y.sub.2 O.sub.3, MgO, CeO.sub.2 and CaO, at a temperature of 1400.degree. to 1600.degree. C. in a non-oxidizing atmosphere so that the molded body becomes black, and subjecting the sintered body to the mirror polishing treatment. The decorative article prepared according to this process has a black and glossy mirror surface and also has high flexural strength and high toughness.

REFERENCES:
patent: 4430279 (1984-02-01), Hagio et al.

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