JPS5770208A - Preparation of tungsten powder - Google Patents
Preparation of tungsten powderInfo
- Publication number
- JPS5770208A JPS5770208A JP14702580A JP14702580A JPS5770208A JP S5770208 A JPS5770208 A JP S5770208A JP 14702580 A JP14702580 A JP 14702580A JP 14702580 A JP14702580 A JP 14702580A JP S5770208 A JPS5770208 A JP S5770208A
- Authority
- JP
- Japan
- Prior art keywords
- potassium
- tungsten
- reduced
- added
- tungsten oxide
- 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.)
- Granted
Links
Landscapes
- Manufacture And Refinement Of Metals (AREA)
- Manufacture Of Metal Powder And Suspensions Thereof (AREA)
Abstract
PURPOSE: To obtain a tungsten powder for a tubular globe containing an appropriate amount of potassium by a method wherein tungsten oxide to which potassium added as a doping agent is reduced to a limited oxygen amount in a specific temp. renge and, subsequently, reduced until metallic tungsten.
CONSTITUTION: At lest potassium such as potassium silicate or the like is added to tungsten oxide as a doping agent and the doped tungsten oxide is reduced until an oxygen amount thereof is reached to 10W15% in a temp. range of 550W700°C. Subsequently, the partially reduced tungsten oxide is reduced to metallic tungsten and most of added potassium is dissolved and removed by washing the metallic tungsten with fluoric acid. In this case, a minute amount of potassium invaded into an interior of tungsten is formed into a K-W-O compound on the way of reduction and remained therein. By this method, a tungsten powder containing about 70W150ppm of potassium is easily obtained.
COPYRIGHT: (C)1982,JPO&Japio
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP14702580A JPS607683B2 (en) | 1980-10-20 | 1980-10-20 | Manufacturing method of tungsten powder |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP14702580A JPS607683B2 (en) | 1980-10-20 | 1980-10-20 | Manufacturing method of tungsten powder |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| JPS5770208A true JPS5770208A (en) | 1982-04-30 |
| JPS607683B2 JPS607683B2 (en) | 1985-02-26 |
Family
ID=15420836
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP14702580A Expired JPS607683B2 (en) | 1980-10-20 | 1980-10-20 | Manufacturing method of tungsten powder |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPS607683B2 (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN100453215C (en) * | 2005-10-11 | 2009-01-21 | 自贡硬质合金有限责任公司 | Method for producing potassium-contd. metal tungsten bars |
-
1980
- 1980-10-20 JP JP14702580A patent/JPS607683B2/en not_active Expired
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN100453215C (en) * | 2005-10-11 | 2009-01-21 | 自贡硬质合金有限责任公司 | Method for producing potassium-contd. metal tungsten bars |
Also Published As
| Publication number | Publication date |
|---|---|
| JPS607683B2 (en) | 1985-02-26 |
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