Studies of the Crystallization through Volume Change from Bi-Sr-(Ca, Cd)-Cu-O Amorphous Materials

Bi-Sr-(Ca, Cd)-Cu-O 비정질체의 체적변화에 따른 결정화 과정 연구

  • 한영희 (전력연구원 전력계통연구실) ;
  • 성태현 (전력연구원 전력계통연구실) ;
  • 한상철 (전력연구원 전력계통연구실) ;
  • 이준성 (전력연구원 전력계통연구실) ;
  • 정상진 (전력연구원 전력계통연구실)
  • Published : 1999.02.01

Abstract

The crystallization mechanism of an amorphous $Bi_{2}$$Sr_{2}$$Ca_{2 x}$$Cd_{x}$$Cu_{3}$$O_{y}$ phase were studied from the relations between crystallization and volume changes by dilatometry. Further, the effect of addition of CdO on the crystallization mechanism and superconductivity was discussed. The shrinkage of the amorphous $Bi_{2}$$Sr_{2}$$Ca_{2 x}$$Cd_{x}$$Cu_{3}$$O_{y}$ occurred with the crystallization of $Bi_{2}$$Sr_{2}$Cu$O_{6}$ phase decrease with increasing CdO content with a minimum at x=0.4. Better superconductivity was obtained in the specimens formation less amount of the$Bi_{2}$$Sr_{2}$Cu$O_{6}$ phase during the crystallization process.

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