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http://dx.doi.org/10.4150/KPMI.2007.14.3.173

Characteristics of Tantalum Powder Manufactured by the MR and EMR Process  

Park, Hyeoung-Ho (Material science and Metallurgical Engineering, Chonbuk University)
Yoon, Jae-Sik (Korea Basic Science Institute)
Bae, In-Sung (Fixon inc.)
Kim, Yang-Soo (Korea Basic Science Institute)
Yoon, Dong-Ju (Fostering project corps of industrial - academic cooperation centered university Sunchon University)
Won, Dae-Hee (Fostering project corps of industrial - academic cooperation centered university Sunchon University)
Kim, Byung-Il (Material Science and Metallurgical Engineering, Sunchon University)
Publication Information
Journal of Powder Materials / v.14, no.3, 2007 , pp. 173-179 More about this Journal
Abstract
In the metallothermic reduction (MR) process used to obtain tantalum powder in one batch, it is difficult to control the morphology and location of the tantalum deposits. On the other hand, an electronically mediated reaction (EMR) process is capable of overcoming this difficulty. The effect of using $K_2TaF_7$ as the raw material and sodium as the reducting agent on the characteristics of tantalum powder are investigated. As the temperature of the reduction varied from 1023K to 1223K, the powder particles obtained with MR were relatively large $({\sim}34{\mu}m)$, while those prepared via EMR were of uniform $(13{\mu}m)$. In the MR process, the Ta powder recovery rate increased from 37% to 83% at 1123K in constrat with EMR process.
Keywords
Tantalum powder; Metallothermic reduction; Electronically mediated reaction; Particle size;
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