Fabrication of YBCO films in MOD processing using F-free Cu precursor solution

F-free 구리 전구용액을 이용한 YBCO 박막 제조

  • 김영국 (한국기계연구원 신기능재료연구본부) ;
  • 유재무 (한국기계연구원 신기능재료연구본부) ;
  • 고재웅 (한국기계연구원 신기능재료연구본부) ;
  • 정국채 (한국기계연구원 신기능재료연구본부) ;
  • 김영준 (㈜일진전기) ;
  • 한봉수 (㈜일진전기)
  • Published : 2005.09.01

Abstract

Superconducting YBCO films were successfully fabricated by MOD process using F-free Cu precursor solution. In this study. a chemically modified precursor solution for MOD Processing was synthesized using metal-organic salts and F-free Cu precursor. 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 $Ar/O_2$ prepared on a $LaA1O_3$ single crystal substrate $(10mm{\times}10mm)$ gives transport Ic of 10A at 77K. This chemical modification approach is a possible candidate for improving MOD-processing of YBCO coated conductor.

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