Title: Production of high-voltage high specific capacitance tantalum powder by means of carbon reduction
Application Number: 88105687 Application Date: 1988.03.18
Publication Number: 1035852 Publication Date: 1989.09.27
Approval Pub. Date: Granted Pub. Date: 1993.06.16
International Classifi-cation: B22F9/20,C22B34/24,H01G9/05
Applicant(s) Name: Central-South China Polytechnic Univ. Address: 410083
Inventor(s) Name:
Attorney & Agent: TENG MING LI ZHANMING
Abstract:
     The carbon reduction of producing tantalum powder for capacitor of high-voltage high-specific capacitance (63 v, 2,800 muF.V/g) belongs to the field of metallurgy. The present invention features that the Ta2O5 is first carbon-reduced in two stages and that the reduction product is sintered and refined at high temp., and hydrogenated to produce powder, then hydraulically separated, patially doped, mixed, and dehydrogenated and heat-treated. The tantalum powder produced according to the present invention has excellent physical, chemical and electrical properties and stable quality, thus it is suitable for produce capacitors with high rate of finished products.
Time: 8