Making of tantalum powder using the hunter process

被引：12

作者：

Cho, SW

Shim, G

Park, JS

Kim, JS

Bae, IS

Yoon, JS

Jeong, SM

机构：

[1] Korea Inst Geosci & Mineral Resources, Minerals & Mat Proc Res Div, Taejon 305350, South Korea

[2] Fixon Co Ltd, Gwangyang Si 545833, Jeonnam, South Korea

来源：

METALS AND MATERIALS INTERNATIONAL | 2006年 / 12卷 / 01期

关键词：

hunter process; metallothermic reduction; tantalum; tantalum powder; capacitor;

D O I：

10.1007/BF03027523

中图分类号：

T [工业技术];

学科分类号：

08 ;

摘要：

Tantalum powder was made from potassium heptafluorotantalate (K2TaF7) using sodium as a reductant based on the Hunter metallothermic reduction method. The apparatus for the experiment was designed and built specifically for the present study. The tantalum particle size greatly decreased as the reduction temperature decreased from 860 to 740 degrees C. The particle size was fairly uniform, varying from 2-3 mu m to submicron sizes depending oil the reaction temperature. Holding the reactants for more than 10 Minutes after the completion of a sodium feeding caused irregular particle growth, thereby affecting particle size uniformity. It was round to be possible to agglomerate the powder to tens of micrometers in size by a vacuum heat treatment at 1350 degrees C. The formation of Ta2C during the beat treatment shows that care must be taken to prevent contamination from the furnace environment.

引用

页码：51 / 56

页数：6