JPS5717499A - Manufacture of silicon nitride whisker - Google Patents
Manufacture of silicon nitride whiskerInfo
- Publication number
- JPS5717499A JPS5717499A JP8861580A JP8861580A JPS5717499A JP S5717499 A JPS5717499 A JP S5717499A JP 8861580 A JP8861580 A JP 8861580A JP 8861580 A JP8861580 A JP 8861580A JP S5717499 A JPS5717499 A JP S5717499A
- Authority
- JP
- Japan
- Prior art keywords
- powder
- silicon nitride
- granules
- shirasu
- nitride whisker
- 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
- Silicon Compounds (AREA)
- Crystals, And After-Treatments Of Crystals (AREA)
Abstract
PURPOSE: To manufacture silicon nitride whisker by mixing powder of "Shirasu" (pumiceous sand) with Al powder in a specified wt. ratio, granulating the mixture, heating the granules to a specified temp. in a flow of gaseous nitrogen in the presence of a CO feeding source, and collecting the resulting fibrous substance.
CONSTITUTION: Purified Shirasu powder freed of iron simply is mixed with Al powder in 4:1W1:1wt. ratio on the basis of SiO2 in the Shirasu. To the mixture are added a binder such as starch or polyvinyl alcohol which is used as a CO feeding source in the next heating process and water, and they are formed into granules having 0.5W2mm grain size. The granules are charged into the lower part of a vessel 3 made of graphite, and they are heated to 1,400W1,800°C through a furnace core tube 1 and a uniformly heating pipe 2 while introducing gaseous nitrogen from a pipe 5. The binder is decomposed to generate CO, and white fibrous silicon nitride whisker is formed on the upper ceiling and side wall of the vessel 3.
COPYRIGHT: (C)1982,JPO&Japio
Priority Applications (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
JP8861580A JPS5854120B2 (en) | 1980-06-30 | 1980-06-30 | Method for manufacturing silicon nitride whiskers |
Applications Claiming Priority (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
JP8861580A JPS5854120B2 (en) | 1980-06-30 | 1980-06-30 | Method for manufacturing silicon nitride whiskers |
Publications (2)
Publication Number | Publication Date |
---|---|
JPS5717499A true JPS5717499A (en) | 1982-01-29 |
JPS5854120B2 JPS5854120B2 (en) | 1983-12-02 |
Family
ID=13947705
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
JP8861580A Expired JPS5854120B2 (en) | 1980-06-30 | 1980-06-30 | Method for manufacturing silicon nitride whiskers |
Country Status (1)
Country | Link |
---|---|
JP (1) | JPS5854120B2 (en) |
Cited By (3)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US4521393A (en) * | 1984-04-18 | 1985-06-04 | Toshiba Ceramics Co. Limited | Method of manufacturing β type silicon nitride whiskers |
US4525335A (en) * | 1982-04-01 | 1985-06-25 | Tateho Kagaku Kogyo Kabushiki Kaisha | Method of manufacturing crystalline silicon nitride and method of separation thereof |
WO1997026222A1 (en) * | 1996-01-16 | 1997-07-24 | Advanced Minerals Corporation | Purified natural glass product |
-
1980
- 1980-06-30 JP JP8861580A patent/JPS5854120B2/en not_active Expired
Cited By (3)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US4525335A (en) * | 1982-04-01 | 1985-06-25 | Tateho Kagaku Kogyo Kabushiki Kaisha | Method of manufacturing crystalline silicon nitride and method of separation thereof |
US4521393A (en) * | 1984-04-18 | 1985-06-04 | Toshiba Ceramics Co. Limited | Method of manufacturing β type silicon nitride whiskers |
WO1997026222A1 (en) * | 1996-01-16 | 1997-07-24 | Advanced Minerals Corporation | Purified natural glass product |
Also Published As
Publication number | Publication date |
---|---|
JPS5854120B2 (en) | 1983-12-02 |
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