Title:
【発明の名称】透光性イツトリア焼結体の製造方法
Document Type and Number:
Japanese Patent JP2773193
Kind Code:
B2
Abstract:
A light transmitting yttria sintered body having good light transmission, can be prepared by a method of preparing a light transmitting yttria sintered body which comprises steps of densifying yttria powder having purity of not lower than 99.9 % and a BET specific surface area of not smaller than 10 m<2>/g by a hot press at a temperature of 1300 to 1700 DEG C under a pressure of 100 to 500 kg/cm<2> in a vacuum circumstance 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 DEG C under a pressure of not lower than 500 kg/cm<2>.
Inventors:
Akito Fujii
Kenichiro Shibata
Kenichiro Shibata
Application Number:
JP5148689A
Publication Date:
July 09, 1998
Filing Date:
March 03, 1989
Export Citation:
Assignee:
Sumitomo Electric Industries, Ltd.
International Classes:
C04B35/50; C04B35/505; C04B35/645; (IPC1-7): C04B35/50
Domestic Patent References:
| JP63201061A |
Attorney, Agent or Firm:
Masao Yamamoto