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탄탈륨 산화물의 마그네슘 가스환원에 의한 탄탈륨 금속분말 제조 KCI 등재

Fabrication of Metallic Tantalum Powder by Magnesium-gas Reduction of Tantalum Oxide

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한국분말야금학회지 (Journal of Korean Powder Metallurgy Institute)
한국분말재료학회(구 한국분말야금학회) (Korean Powder Metallurgy Institute)
초록

Metallic tantalum powder is manufactured by reducing tantalum oxide (Ta2O5) with magnesium gas at 1,073–1,223 K in a reactor under argon gas. The high thermodynamic stability of magnesium oxide makes the reduction reaction from tantalum oxide into tantalum powder possible. The microstructure after the reduction reaction has the form of a mixture of tantalum and magnesium oxide, and the latter could be entirely eliminated by dissolving in weak hydrochloric acid. The powder size in SEM microstructure for the tantalum powder increases after acid leaching in the range of 50–300 nm, and its internal crystallite sizes are observed to be 11.5 to 24.7 nm with increasing reduction temperatures. Moreover, the optimized reduction temperature is found to be 1,173 K as the minimum oxygen concentration is approximately 1.3 wt.%.

목차
Abstract
 1. 서 론
 2. 실험 방법
 3. 결과 및 고찰
 4. 결 론
 References
저자
  • 이동원(타이타늄연구실 재료연구소) | Dong-Won Lee (Titanium Department, Korea Institute of Materials Science (KIMS)) Corresponding Author