Korean Journal of Materials Research (한국재료학회지)

Materials Research Society of Korea (한국재료학회)
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Physical Property Evaluation for High Purity Niobium and Tantalum Rare Metals

고순도 나이오븀과 탄탈륨 희유금속의 물리적 특성평가

  • Kim Il-Ho (Dept. Materials Science and Engineering/ReSEM, Chungju National University) ;
  • Park Jong-Bum (Dept. Materials Science and Engineering/ReSEM, Chungju National University) ;
  • You Sin-Wook (Dept. Materials Science and Engineering/ReSEM, Chungju National University) ;
  • Cho Kyung-Won (Dept. Materials Science and Engineering/ReSEM, Chungju National University) ;
  • Choi Good-Sun (Minerals and Materials Processing Div., Korea Institute of Geoscience and Mineral Resources) ;
  • Suh Chang-Youl (Minerals and Materials Processing Div., Korea Institute of Geoscience and Mineral Resources) ;
  • Kim Byoung-Gyu (Minerals and Materials Processing Div., Korea Institute of Geoscience and Mineral Resources) ;
  • Kim Joon-Soo (Minerals and Materials Processing Div., Korea Institute of Geoscience and Mineral Resources)
  • 김일호 (충주대학교 신소재공학과/친환경 에너지 변환 저장소재 및 부품개발 연구센터) ;
  • 박종범 (충주대학교 신소재공학과/친환경 에너지 변환 저장소재 및 부품개발 연구센터) ;
  • 유신욱 (충주대학교 신소재공학과/친환경 에너지 변환 저장소재 및 부품개발 연구센터) ;
  • 조경원 (충주대학교 신소재공학과/친환경 에너지 변환 저장소재 및 부품개발 연구센터) ;
  • 최국선 (한국지질자원연구원 자원활용소재연구부) ;
  • 서창열 (한국지질자원연구원 자원활용소재연구부) ;
  • 김병규 (한국지질자원연구원 자원활용소재연구부) ;
  • 김준수 (한국지질자원연구원 자원활용소재연구부)
  • Published : 2005.04.01
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Abstract

Thermal, electrical and mechanical properties of high purity niobium and tantalum refractory rare metals were investigated tn evaluate the physical purity. Higher purity niobium and tantalum metals showed lower hardness due to smaller solution hardening effect. Temperature dependence of electrical resistivity showed a typical metallic behavior. Remarkable decrease in electrical resistivity was observed for a high purity specimen at low temperature. However, thermal conductivity increased for a high purity specimen, and abrupt increase in thermal conductivity was observed at very low temperature, indicating typical temperature dependence of thermal conductivity for high purity metals. It can be known that reduction of electron-phonon scattering leads to increase in thermal conductivity of high purity niobium and tantalum metals at low temperature.

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References

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