JPS57183329A - Production of crystallized glass of phosphate salt - Google Patents
Production of crystallized glass of phosphate saltInfo
- Publication number
- JPS57183329A JPS57183329A JP6689681A JP6689681A JPS57183329A JP S57183329 A JPS57183329 A JP S57183329A JP 6689681 A JP6689681 A JP 6689681A JP 6689681 A JP6689681 A JP 6689681A JP S57183329 A JPS57183329 A JP S57183329A
- Authority
- JP
- Japan
- Prior art keywords
- glass
- meta
- fine powder
- phosphate salt
- crystallized
- 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
- Glass Compositions (AREA)
- Re-Forming, After-Treatment, Cutting And Transporting Of Glass Products (AREA)
Abstract
PURPOSE: A fine powder of previously crystallized meta-phosphate glass is sprayed on the surface of formed meta-phosphate salt glass to effect the growth of the crystal from the crystal unclei of the fine powder, thus making it possible to produce meta-phosphate crystallized glass oriented in the one direction in a short time.
CONSTITUTION: A mixture of calcium carbonate and orthophosphoric acid is placed in a platinum crucible and heated at 1,200W1,300°C for 1W24hours. The raw materials are melted and glassified homogeneously, then cooled to form a plate or rod. A fine powder of previously crystallized meta-phosphate salt glass is sprayed on the surface, especially on the end surface of the formed glass. Then, the formed glass is heated again at a temperature lower than the softening point but higher the transition one in an atmosphere with a temperature gradient. Crystals grow from the crystal nuclei of the fine powder in hemi- sphere form toward inside to give the objective meta-phosphate salt glass crystallized in one direction in a relatively shorter hours.
COPYRIGHT: (C)1982,JPO&Japio
Priority Applications (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
JP6689681A JPS57183329A (en) | 1981-05-06 | 1981-05-06 | Production of crystallized glass of phosphate salt |
Applications Claiming Priority (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
JP6689681A JPS57183329A (en) | 1981-05-06 | 1981-05-06 | Production of crystallized glass of phosphate salt |
Publications (1)
Publication Number | Publication Date |
---|---|
JPS57183329A true JPS57183329A (en) | 1982-11-11 |
Family
ID=13329138
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
JP6689681A Pending JPS57183329A (en) | 1981-05-06 | 1981-05-06 | Production of crystallized glass of phosphate salt |
Country Status (1)
Country | Link |
---|---|
JP (1) | JPS57183329A (en) |
Cited By (1)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
EP0473048A2 (en) * | 1990-08-21 | 1992-03-04 | Asahi Glass Company Ltd. | Calcium phosphate type glass-ceramic |
-
1981
- 1981-05-06 JP JP6689681A patent/JPS57183329A/en active Pending
Cited By (1)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
EP0473048A2 (en) * | 1990-08-21 | 1992-03-04 | Asahi Glass Company Ltd. | Calcium phosphate type glass-ceramic |
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