Oxide ceramic sintered bodies

Details Oxide ceramic sintered bodies Oxide ceramic sintered bodies

1996-11-27

1998-03-24

Bonner, Melissa

Compositions: ceramic

Ceramic compositions

Titanate, zirconate, stannate, niobate, or tantalate or...

264 65, 264 66, C04B 3546

Patent

active

057312516

ABSTRACT:
A titania ceramic body consists of a surface thereof not exceeding 35 pores per square millimeter. The titania ceramic body is made by preparing a titania powder having a purity of at least 99.8 wt % titania and an average particle diameter of 0.5 .mu.m, compacting the powder, sintering a compact at a temperature in the range for 1000.degree. to 1300.degree. C. in air or in a non-air surrounding gas under ordinary pressure to produce a sintered body, hot isostatic pressing treating the sintered body in argon at a temperature of from 800.degree. C. to below temperature carried out in above sintering step under pressure of at least 500 kg/cm2, and then grinding and polishing the hot isostatic pressing treated body.

REFERENCES:
patent: 3459503 (1969-08-01), Roy et al.
patent: 4677082 (1987-06-01), Alford et al.
patent: 4849142 (1989-07-01), Panda et al.
patent: 4952537 (1990-08-01), Haya et al.
patent: 5001093 (1991-03-01), Roy et al.
patent: 5492872 (1996-02-01), Kishi

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