a 단국대학교 에너지공학과
b 한국생산기술연구원 한국희소금속산업기술센터
c 엔에이티엠(주)
a Department of Energy Engineering, Dankook University, Cheonan-si 311-16, Republic of Korea
b Korea Institute for Rare Metal, KITECH, 12, Gaetbeol-ro, Yeonsu-gu, Incheon-gwangyeoksi, Republic of Korea
c NATM Co., 172-24, Yeongok gil, Ipjang-myeon, Seobuk-gu, Cheonan-si, Republic of Korea
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