Progress in Superconductivity

한국초전도학회 (The Korean Superconductivity Society)
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화학적으로 변형된 전구용액을 이용한 YBCO 박막 제조

Fabrication of YBCO films in MOD processing via chemically modified precursor solution

  • Kim, Y.K. (Korea Institute of Machinery and Materials) ;
  • Yoo, J.M. (Korea Institute of Machinery and Materials) ;
  • Chung, K.C. (Korea Institute of Machinery and Materials) ;
  • Ko, J.W. (Korea Institute of Machinery and Materials) ;
  • Kim, Y.J. (Iljin Electric Co. Ltd.) ;
  • Han, B.S. (Iljin Electric Co. Ltd.)
  • 발행 : 2006.04.01
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초록

Superconducting YBCO films were successfully fabricated by MOD process using chemically modified precursor solution. In this study, a chemically modified precursor solution for MOD processing was synthesized using metal-organic salts and organic additives. It was shown that crack-free and uniform precursor films were formed after calcination in humidified Oxygen atmosphere. Less than 3 hours are required to finish the calcination process. XRD measurement shows that $BaF_2,\;CuO,\;Y_2O_3$ are major constituent of precursor films. Furthermore, YBCO films without any secondary phases were successfully fabricated after annealing in wet $Ar/O_2$ atmosphere. The YBCO film prepared on a $LaAlO_3$ single crystal substrate ($10mm{\times}10mm$) gives transport $I_c$ of 10A at 77K. This chemical modification approach is a possible candidate for improving MOD-processing of YBCO coated conductor.

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