Yttria sintered body and corrosion-resistant material, and...

Details Yttria sintered body and corrosion-resistant material, and... Yttria sintered body and corrosion-resistant material, and...

2006-07-14

2008-08-05

Group, Karl E (Department: 1793)

Compositions: ceramic

Ceramic compositions

Yttrium, lanthanide, actinide, or transactinide containing

Reexamination Certificate

active

07407904

ABSTRACT:
The object of the present invention is to provide an yttria (Y2O3) sintered body having high density and excellent plasma-resistance. The yttria sintered body has a structure in which a Y2O3crystal and a Y3BO6crystal are included as the constituent crystal thereof. In order to produce the yttria sintered body, a boron oxide (B2O3) of 0.02 wt % to 10 wt % is added to an yttria (Y2O3) powder, the mixed powder is formed, and thereafter sintered at 1300-1600° C.

REFERENCES:
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Yanagita et al., Preparation of Transparent Yttrium Oxide Ceramics by HIP Sintering ; “Annual Meeting of The Ceramic Society of Japan, 2004”; Mar. 22, 2004., p. 234; Published in Japan.

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