DEVELOPMENT OF PB-RICH (BI, PB)3SR2CA2CU1OX PHASE DURING REFORMATION OF LEAD DOPED 2223 SUPERCONDUCTING PHASE FROM MELT QUENCHED GLASS


OZKAN N. , GLOWACKI B.

PHYSICA C, vol.194, pp.157-162, 1992 (Journal Indexed in SCI) identifier identifier

  • Publication Type: Article / Article
  • Volume: 194
  • Publication Date: 1992
  • Doi Number: 10.1016/0921-4534(92)90686-7
  • Title of Journal : PHYSICA C
  • Page Numbers: pp.157-162

Abstract

The reformation process of the lead doped superconducting 2223 phase from the melt quenched glass was investigated. It was shown that during the crystallisation of the glass a new lead rich phase, Bi0.5Pb3Sr2Ca2CU1Ox, was formed and severe copper segregation was observed. The volume fraction of the high T(c) 2223 phase increased with annealing time for an annealing temperature of 840-degrees-C. A glass sample annealed at 840-degrees-C for 150 h showed two superconducting transitions T(c) = 107 K and T(c) = 70 K.