发明名称 |
METHOD OF PREPARING TUNGSTEN CARBIDE |
摘要 |
power metallurgy, more particularly preparation of protective coatings. SUBSTANCE: blend is prepared from tungsten-containing stock, sodium carbonate and silicon dioxide at 1.0: 0.45:0.17 ratio and heated to 1400-1450 C. Lower layer of melting product, namely sodium tungstate is separated and charged into hermetically sealed graphite container at sodium tungstate to container ratio of 1:10-20 by volume. Sodium tungstate is decomposed at 1225 C in inert gas atmosphere for 1-2 h. Tungsten carbide yield is 96.7-97.6%. Method is simple and efficient. EFFECT: more efficient preparation method. 1 ex, 1 tbl
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申请公布号 |
RU2179950(C2) |
申请公布日期 |
2002.02.27 |
申请号 |
RU20000108851 |
申请日期 |
2000.04.07 |
申请人 |
INSTITUT MATERIALOVEDENIJA KHABAROVSKOGO NAUCHNOGO;TSENTRA DVO RAN |
发明人 |
BUTUKHANOV V.L.;KHROMTSOVA E.V. |
分类号 |
C01B31/34;(IPC1-7):C01B31/34 |
主分类号 |
C01B31/34 |
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