대한전기학회:학술대회논문집 (Proceedings of the KIEE Conference)

대한전기학회 (The Korean Institute of Electrical Engineers)
권호 표지

질산염(窒酸鹽)과 수산화(水酸化)나트륨을 써서 졸-겔 법(法)으로 만든 $YBa_2Cu_3O_{7-x}$의 특성분석(特性分析)

CHARACTERIZATION OF $YBa_2Cu_3O_{7-x}$ MADE BY A SOL-GEL PROCESS USING NITRATE SALTS AND SODIUM HYDROXIDE

  • 김봉흡 (한양대학교 전기공학과) ;
  • 강형부 (한양대학교 전기공학과) ;
  • 김현택 (한양대학교 전기공학과)
  • Kim, Bong-Heup (Department of Electrical Engineering, Hanyang University) ;
  • Kang, Hyung-Boo (Department of Electrical Engineering, Hanyang University) ;
  • Kim, Hyun-Teak (Department of Electrical Engineering, Hanyang University)
  • 발행 : 1990.11.17
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초록

A sol-gel processing of $YBa_2Cu_3O_{7-x}$ superconductor using metal nitrate salts and sodium hydroxide as the starting materials has been investigated because of the need to produce pure, hompgeneous superconducting materials. Since the precipitation of barium hydroxides can be obtained only at high basicities, the process has to be carried out Ca. pH 13 to get the simultaneous coprecipitation with the other metal hydroxides. The involved reaction mechanisms were investigated and intermediate and final products were characterized by means of thermogravimetric analysis(TGA), infra-red(IR) spectroscopy, X-ray diffraction(XRD) analysis, scanning electron microscopy(SEM), thermal mechanical analysis(TMA) and electrical measurement.

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