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기계화학적 합금화된 나노 Fe-6.5Si 분말의 자기 펄스압에 의한 동적성형
이근희,이창규,김흥회,윤종운,이기선,Lee, G.-H.,Rhee, C.-K.,Kim, W.-W.,Yun, J.-W.,Lee, K.-S. 한국분말야금학회 2005 한국분말재료학회지 (KPMI) Vol.12 No.1
Nano Fe-6.5wt%Si powders have been synthesized by mechano-chemical process (MCP) for an application of soft magnetic core. Owing to hard and brittle characteristics of Fe-6.5Si nano powders having large surface area, it is very difficult to reach high density more than 70% of theoretical density (~7.4 g/$cm_3$) by cold compaction. To overcome such problem a magnetic pulsed compaction (MPC), which is one of dynamic compaction techniques, was applied. The green density was achieved about 78% (~5.8 g/$cm_3$) by MPC at room temperature.
열벽 증착 방법으로 성장한 ZnTeCu 박막의 전기적 특성
박성래(S.G.Park),남성윤(S.G.Nam),오병성(B.S.O),이기선(K.S.Lee) 한국태양에너지학회 1997 한국태양에너지학회 논문집 Vol.17 No.3
열벽 증착(hot-wall evaporation)방법으로 Cu를 첨가한 ZnTe박막을 성장하였다. doping을 하지 않은 ZnTe박막의 전기 전도형은 p-형으로 전기 전도도는 10^-6(Ω·cm)^-1을 정도로 매우 낮았다. 첨가한 Cu의 양에 따라 전기 전도도는 10²(Ω·cm)^-1까지 증가하였으나 이동도는 크게 변하지 않았다. Cu를 매우 많이 첨가한 경우는 금속과 같은 전기 전도도를 관찰하였다. Cu-doped ZnTe thin films have been grown by hot-wall evaporation. The electrical conductivity of the intrinsic ZnTe film was of p-type and as low as 10^-6 (Ω·cm)^-1. As the doped Cu concentration was increased, the electrical conductivity was increased up to 10²(Ω·cm)^-1, but the mobility was decreased a little. The heavily doped sample shows the metal-like electrical resistivity.