• Title/Summary/Keyword: H.W.O.S.T

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THE GROWTH OF GaN/POROUS-Si USING BY MEB

  • Park, S.H.;Chi, C.S.;Park, C.S.;Lee, C.M.;Yang, S.J.;Jung, W.H.;Kang, T.W.;Yoon, G.S.;Kim, C.O.;Eom, G.S.
    • Proceedings of the Materials Research Society of Korea Conference
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    • 1998.08a
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    • pp.94.1-94
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    • 1998

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$CeO_2$ Single Buffer Deposition on RABiTS for SmBCO Coated Conductor

  • Kim, T.H.;Kim, H.S.;Ha, H.S.;Yang, J.S.;Lee, N.J.;Ha, D.W.;Oh, S.S.;Song, K.J.;Jung, Y.H.;Pa, K.C.
    • Proceedings of the Korean Institute of Electrical and Electronic Material Engineers Conference
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    • 2006.11a
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    • pp.180-181
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    • 2006

  • As a rule, high temperature superconducting coated conductors have multi-layered buffers consisting of seed, diffusion barrier and cap layers. Multi-buffer layer deposition requires longer fabrication time. This is one of main reasons which increases fabrication cost Thus, single buffer layer deposition seems to be important for practical coated conductor process. In this study, a single layered buffer deposition of $CeO_2$ for low cost coated conductors has been tried using thermal evaporation technique 100nm-thick $CeO_2$ layers deposited by thermal evaporation were found to act as a diffusion layer. $0.4{\mu}m$-thick SmBCO superconducting layers were deposited by thermal co-evaporation on the $CeO_2$ buffered Ni-W substrate. Critical current of 118A/$cm^2$ was obtained for the SmBCO coated conductors.

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A Study on $H_2$ Gas Sensing Characteristics of $SnO_2$ Micro Gas Sensor ($SnO_2$ 마이크로 가스센서의 $H_2$ 가스 감지특성에 관한 연구)

  • Kim, C.K.;Lee, J.H.;Lee, B.W.;Lee, K.W.;Lee, J.H.;Lee, T.S.
    • Proceedings of the KAIS Fall Conference
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    • 2006.11a
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    • pp.135-138
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    • 2006

  • $H_2$ 실험은 마이크로 가스센서를 초기에 공기 분위기에서 초기 저항 값을 측정하였다. $SnO_2/Pd/V_2O_5$으로 구성된 감지물질은 수소 농도 5000ppm에서 초기 저항 값을 기준으로 하여 10배 감소하는 우수한 감도 반응을 확인할 수 있었다.

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