发明名称 |
METHOD OF PRODUCTION OF METALLIC SILICON |
摘要 |
non- ferrous metallurgy; carbothermal method of production of silicon for photoelectronic industry, manufacture of solar batteries inclusive. SUBSTANCE: method consists in carbothermal reduction of silicon dioxide by organic reductant; liquid phenolic resin is used as organic reductant. Silicon production process includes three stages of heat treatment: from room temperature up to 160 C at pressure of 0.1 to 0.7 MPa, to 800 C at 1 hour delay, to 1700 C in inert gas atmosphere at two stages: to 1300-1400 C at pressure of 0.01 Pa and from 1300 --1400 C to 1700 C at pressure rising from 0.01 Pa to 0.1 MPa. Amount of admixtures in silicon dioxide does not exceed 190 ppm; content of admixtures in liquid phenolic resin does not exceed 90 ppm. EFFECT: improved level of interphase interaction of silicon dioxide and carbon reductant obtained from organic compound which results in facilitated procedure of production, reduced power requirements and increased output. 3 cl, 3 tbl
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申请公布号 |
RU2160705(C2) |
申请公布日期 |
2000.12.20 |
申请号 |
RU19990102710 |
申请日期 |
1999.02.11 |
申请人 |
OTKRYTOE AKTSIONERNOE OBSHCHESTVO NAUCHNO-PROIZVOD;STVENNOE OB KOMPOZIT |
发明人 |
BOGACHEV E.A.;ABDJUKHANOV I.M.;TIMOFEEV A.N.;ABDJUKHANOV M.A. |
分类号 |
C01B33/025;C22B5/10;C22B61/00;(IPC1-7):C01B33/025 |
主分类号 |
C01B33/025 |
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