Method for obtaining a zirconia based item

Plastic and nonmetallic article shaping or treating: processes – Direct application of electrical or wave energy to work – Producing or treating inorganic material – not as pigments,...

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264345, 264432, C04B 3548

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active

056908873

ABSTRACT:
A method for obtaining a finished or semi-finished item in sintered zirconia having a metallic appearance comprises the steps of providing at least one previously shaped and sintered zirconia item in its finished or semi-finished shape, placing the item in an oven in which there is a plasma containing hydrogen, bringing the item to a temperature of around 800.degree. C. or more, and maintaining the item at this temperature for a period of time from around a quarter of an hour to three hours, preferably two hours.

REFERENCES:
patent: 3432296 (1969-03-01), McKinnon et al.
patent: 3935371 (1976-01-01), Camacho et al.
patent: 4119469 (1978-10-01), Carbonnel et al.
patent: 4501717 (1985-02-01), Tsukamoto et al.
patent: 5171491 (1992-12-01), Kim
Database WPI Section Ch, Week 8721 Derwent Publications Ltd., London, GB; Class L02, AN 87-146562 & JP-A-62 083 366 (Kyocera Corp), 16 Apr.1987.
Patent Abstracts of Japan vol. 015, No. 373 (C-0869), 19 Sep. 1991 & JP-A-03 150263 (JGC Corp) 26 Jun. 1991.

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