G - Physics – 02 – B
Patent
G - Physics
02
B
31/122, 25/141
G02B 1/02 (2006.01) C01G 99/00 (2010.01) C04B 35/505 (2006.01) C04B 35/645 (2006.01)
Patent
CA 2011248
The present invention is directed to a light transmitting yttria sintered body having good light transmission, which can be prepared by a method comprising the steps of densifying yttria powder having a purity of not lower than 99.9 % and a BET specific surface area of not smaller than 10 m2/g by a hot press at a temperature of 1300 to 1700°C under a pressure of 100 to 500 kg/cm2 under vacuum conditions so as to achieve the theoretical density ratio of not lower than 95 % and then hot isotropically pressing densified yttria at a temperature of 1400 to 1900°C under a pressure of not lower than 500 kg/cm2. The light transmitting yttria sintered body of the present invention is suitable for use as an infrared transmitting window.
Fujii Akihito
Shibata Kenichiro
Kirby Eades Gale Baker
Sumitomo Electric Industries Ltd.
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