JPS6442348A - Production of polycrystalline calcium fluoride sintered body - Google Patents
Production of polycrystalline calcium fluoride sintered bodyInfo
- Publication number
- JPS6442348A JPS6442348A JP62199097A JP19909787A JPS6442348A JP S6442348 A JPS6442348 A JP S6442348A JP 62199097 A JP62199097 A JP 62199097A JP 19909787 A JP19909787 A JP 19909787A JP S6442348 A JPS6442348 A JP S6442348A
- Authority
- JP
- Japan
- Prior art keywords
- sintering
- calcium fluoride
- pressure
- sintered body
- temp
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Pending
Links
Landscapes
- Compositions Of Oxide Ceramics (AREA)
Abstract
PURPOSE:To produce a calcium fluoride sintered body, capable of sintering calcium fluoride powders under an industrially available temp. and pressure, and of good translucence and strength by sintering the calcium fluoride powders in a specific ranges of temp. and pressure. CONSTITUTION:A target sintered body is produced by sintering the calcium fluoride powders at 950-1,100 deg.C under 250-2,000kg/cm<2> pressure. The calcium fluoride powders to be used are desired to be of high purity, usually being >=99% purity, in order to increase the translucence of the obtained sintered body. The sintering is carried out after molding the calcium fluoride powders to be a raw material. The temp. and pressure for the sintering are able to be interdependently changed. The sintering pressure can be increased when the sintering temp. is relatively low, and the sintering pressure can be decreased when the sintering temp. is relatively high.
Priority Applications (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
JP62199097A JPS6442348A (en) | 1987-08-11 | 1987-08-11 | Production of polycrystalline calcium fluoride sintered body |
Applications Claiming Priority (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
JP62199097A JPS6442348A (en) | 1987-08-11 | 1987-08-11 | Production of polycrystalline calcium fluoride sintered body |
Publications (1)
Publication Number | Publication Date |
---|---|
JPS6442348A true JPS6442348A (en) | 1989-02-14 |
Family
ID=16402071
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
JP62199097A Pending JPS6442348A (en) | 1987-08-11 | 1987-08-11 | Production of polycrystalline calcium fluoride sintered body |
Country Status (1)
Country | Link |
---|---|
JP (1) | JPS6442348A (en) |
Cited By (3)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
JPH03112667U (en) * | 1990-02-28 | 1991-11-18 | ||
JP2011020917A (en) * | 2009-06-17 | 2011-02-03 | Nikon Corp | METHOD FOR PRODUCING Ca-Gd-F-BASED TRANSLUCENT CERAMIC, Ca-Gd-F-BASED TRANSLUCENT CERAMIC, OPTICAL MEMBER, OPTICAL SYSTEM AND COMPOSITION FOR MOLDING CERAMIC |
WO2012165334A1 (en) * | 2011-05-27 | 2012-12-06 | 株式会社ニコン | CaF2 POLYCRYSTALLINE BODY, FOCUS RING, PLASMA TREATMENT APPARATUS, AND METHOD FOR PRODUCING CaF2 POLYCRYSTALLINE BODY |
-
1987
- 1987-08-11 JP JP62199097A patent/JPS6442348A/en active Pending
Cited By (3)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
JPH03112667U (en) * | 1990-02-28 | 1991-11-18 | ||
JP2011020917A (en) * | 2009-06-17 | 2011-02-03 | Nikon Corp | METHOD FOR PRODUCING Ca-Gd-F-BASED TRANSLUCENT CERAMIC, Ca-Gd-F-BASED TRANSLUCENT CERAMIC, OPTICAL MEMBER, OPTICAL SYSTEM AND COMPOSITION FOR MOLDING CERAMIC |
WO2012165334A1 (en) * | 2011-05-27 | 2012-12-06 | 株式会社ニコン | CaF2 POLYCRYSTALLINE BODY, FOCUS RING, PLASMA TREATMENT APPARATUS, AND METHOD FOR PRODUCING CaF2 POLYCRYSTALLINE BODY |
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