Journal of the Korean Ceramic Society (한국세라믹학회지)

The Korean Ceramic Society (한국세라믹학회)
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Bond Strength of SrZrO3 Coatings on Ag Sheathed Bi(2223) Mono-core Tape

은이 피복된 단심 Bi(2223) 초전도 선재에 대한 SrZrO3 코팅층의 접착강도 특성

  • Lee, Se-Jong (Department of Materials Engineering, Kyungsung University) ;
  • Ye, Kyung-Hwan (Department of Aviation Materials Engineering, Hankuk Aviation University) ;
  • Lee, Deuk-Yong (Department of Materials Engineering, Daelim College of Technology) ;
  • Song, Yo-Seung (Department of Aviation Materials Engineering, Hankuk Aviation University)
  • 이세종 (경성대학교 재료공학과) ;
  • 예경환 (한국항공대학교 항공재료공학과) ;
  • 이득용 (대림대학 재료정보학과) ;
  • 송요승 (한국항공대학교 항공재료공학과)
  • Published : 2002.01.01
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Abstract

Bond strength of $SrZrO_3$ resistive oxide barrier on Ag sheathed Bi(2223) tapes prepared by the sol-gel and dip-coating method was evaluated with an aid of Taguchi method and $L_18(2^1{\times}3^7)$ orthogonal arrays to determine the optimal process combination of levels of factors that best satisfy the bigger is better quality characteristic. The observed optimal condition is as follows: Sr/Zr mol ratio(0.3/0.7), amount of organic vehicle(5 wt%), drying temperature and time(160${\circ}C$, 10 min), heat treatment temperature and time(500${\circ}C$, 20 min), respectively. ANOVA analysis suggested that the influence of the factors within ${\alpha}$=0.1 was significant with a 90% confidence level.

은이 피복된 Bi(2223) 단심 초전도 선재에 절연층으로 $SrZrO_3$ 피막을 졸-겔과 딥-코팅법으로 제조하여 $SrZrO_3$ 코팅층과 초전도 선재간 접착력 특성을 조사하였다. 실험인자로는 출발원료의 몰비, 유기화합물 첨가량, 건조온도 및 시간, 열처리 온도 및 시간이었으며 다구찌법의 망대특성과 $L_18(2^1{\times}3^7)$ 직교배열표를 이용하여 코팅층의 최적조건인 인자와 수준 조합의 최적화를 접착강도를 측정하여 분석하였다. 최적의 접착 특성을 가진 코팅조건은 Sr/Zr의 몰비가 0.3/0.7, 유기화합물 첨가량이 5wt%, 건조온도 및 시간은 160${\circ}C$ 10분, 열처리 온도 및 시간은 500${\circ}C$ 20분이었다. 분산분석 결과, 유의수준이 ${\alpha}$=0.1인 통계적으로 90% 신뢰공정이었다.

Keywords

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