Consideration of Diluents Selection and Input Amounts of the Hunter Process for Tantalum Production

Jae-Jin Sim; Sang-Hoon Choi; Yong-Kwan Lee; Sung Gue Heo; Taek-Soo Kim; Seok-Jun Seo; Kyoung-Tae Park

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자료유형: 학술저널

저자정보: Jae-Jin Sim (Korea Institute of Industrial Technology) Sang-Hoon Choi (Korea Institute of Industrial Technology) Yong-Kwan Lee (Korea Institute of Industrial Technology) Sung Gue Heo (Korea Institute of Industrial Technology) Taek-Soo Kim (Korea Institute of Industrial Technology) Seok-Jun Seo (Korea Institute of Industrial Technology) Kyoung-Tae Park (Korea Institute of Industrial Technology)

저널정보: 대한금속·재료학회 Metals and Materials International Metals and Materials International Vol.27 No.7

발행연도: 2021.1

수록면: 1,980 - 1,987 (8page)

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Tantalum (Ta) is a heavy refractory metal with an atomic weight of 180.95 g/mol, a density of 16.6 g/cm3, and a high meltingpoint of 3017 °C. With its refractory characteristics, it shows excellent chemical and physical stability as well as corrosionand heat resistance at elevated temperatures. The demand for Ta metal and related compounds is increasing with the expansionof the electronics and chemical industries. The Hunter process was proven to be effective in producing Ta powder in1953. Hunter proposed a method in which potassium heptafluorotantalate (K2TaF7) was reduced by sodium (Na). Thus far,this process has been the primary commercial method to produce Ta powder. In this study, quantitative differences wereanalyzed for diluent selection. Additionally, consideration was given to changes in the caloric value depending on the inputamount of diluents. Finally, the optimum material input and the properties of the prepared Ta were analyzed. Stoichiometricratios of K2TaF7(1 mol), NaCl (6.2–6.7 mol), Na (5–7 mol) were weighed, to perform a metallothermic reduction reaction. After the reaction, the tantalum powder was recovered and the flush process was carried out. After that, it was dried in avacuum atmosphere. Physical properties such as oxygen concentration, PSA, ICP-OES, and XRD of powder were conductedto evaluate the characteristics of Ta powder that was finally manufactured.

#Tantalum · Hunter process · Metallothermic reduction · Powder · Diluent

참고문헌 (13)

참고문헌 신청

1998 / Tantalum-Niobium International Study Center (TIC) Bull., No. 104

S. Hayashida / 1999 / Ind. Rare Met 115:31

A. D. Hartman / 1998 / JOM 50:16

A. Hunter / 1953 / J. Met 5:130~132

S. Naboychenko / 2019 / Handbook of Non-Ferrous Metal Powders: Technologies and Applications / Elsevier :742

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