JPS5788011A - Manufacture of silicon nitride - Google Patents

Manufacture of silicon nitride

Info

Publication number
JPS5788011A
JPS5788011A JP15943080A JP15943080A JPS5788011A JP S5788011 A JPS5788011 A JP S5788011A JP 15943080 A JP15943080 A JP 15943080A JP 15943080 A JP15943080 A JP 15943080A JP S5788011 A JPS5788011 A JP S5788011A
Authority
JP
Japan
Prior art keywords
soln
silicon nitride
silicic acid
prepared
carbon
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
Application number
JP15943080A
Other languages
Japanese (ja)
Inventor
Masami Yamaguchi
Yoshiro Tazane
Ryoji Kitahama
Isamu Iwami
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Asahi Dow Ltd
Asahi Chemical Industry Co Ltd
Original Assignee
Asahi Dow Ltd
Asahi Chemical Industry Co Ltd
Priority date (The priority date 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 date listed.)
Filing date
Publication date
Application filed by Asahi Dow Ltd, Asahi Chemical Industry Co Ltd filed Critical Asahi Dow Ltd
Priority to JP15943080A priority Critical patent/JPS5788011A/en
Priority to US06/294,027 priority patent/US4396587A/en
Priority to EP81303928A priority patent/EP0047143B1/en
Priority to DE8181303928T priority patent/DE3166037D1/en
Publication of JPS5788011A publication Critical patent/JPS5788011A/en
Pending legal-status Critical Current

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  • Crystals, And After-Treatments Of Crystals (AREA)

Abstract

PURPOSE: To efficiently obtain fibrous silicon nitride by using the freeze-dried product of a mixture prepared by treating carbonaceous powder with a (modified) silicic acid soln. as starting material for nitriding and by heating the product in a nonoxidizing atmosphere contg. nitrogen.
CONSTITUTION: About 0.3W5pts.wt. (as carbon) of carbonaceous powder such as powder of carbon black, graphite or acrivated carbon are brought into contact with 1pt. (as SiO2) of a silicic acid soln. prepared by acid-decomposing or dealkalizing an aqueous alkali silicate soln. or a modified silicic acid soln. prepared by treating an aqueous alkali siliciate soln. with ammonium ions or an ion exhange resin holding org. amine or the like. The contact is carried out by soaking, kneading or other method. The resulting mixture is freeze-dried and heated to about 1,300W1,600°C in a nonoxidizing atmosphere contg. nitrogen to obtain desired fibrous silicon nitride.
COPYRIGHT: (C)1982,JPO&Japio
JP15943080A 1980-08-29 1980-11-14 Manufacture of silicon nitride Pending JPS5788011A (en)

Priority Applications (4)

Application Number Priority Date Filing Date Title
JP15943080A JPS5788011A (en) 1980-11-14 1980-11-14 Manufacture of silicon nitride
US06/294,027 US4396587A (en) 1980-08-29 1981-08-18 Method for manufacture of silicon nitride
EP81303928A EP0047143B1 (en) 1980-08-29 1981-08-27 Method for manufacture of silicon nitride
DE8181303928T DE3166037D1 (en) 1980-08-29 1981-08-27 Method for manufacture of silicon nitride

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP15943080A JPS5788011A (en) 1980-11-14 1980-11-14 Manufacture of silicon nitride

Publications (1)

Publication Number Publication Date
JPS5788011A true JPS5788011A (en) 1982-06-01

Family

ID=15693566

Family Applications (1)

Application Number Title Priority Date Filing Date
JP15943080A Pending JPS5788011A (en) 1980-08-29 1980-11-14 Manufacture of silicon nitride

Country Status (1)

Country Link
JP (1) JPS5788011A (en)

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