AG-DOPED 120-K YBA2CU3O7-DELTA SUPERCONDUCTORS PREPARED BY THE FLAME-QUENCH-MELT-GROWTH (FQMG) METHOD


YANMAZ E. , MUTLU I., KUCUKOMEROGLU T. , ALTUNBAS M.

SUPERCONDUCTOR SCIENCE & TECHNOLOGY, vol.7, no.12, pp.903-907, 1994 (Journal Indexed in SCI) identifier identifier

  • Publication Type: Article / Article
  • Volume: 7 Issue: 12
  • Publication Date: 1994
  • Doi Number: 10.1088/0953-2048/7/12/004
  • Title of Journal : SUPERCONDUCTOR SCIENCE & TECHNOLOGY
  • Page Numbers: pp.903-907

Abstract

The effect of Ag-doping on the microstructure and physical properties of YBa2Cu3O7-delta superconductors prepared by a flame-quench-melt-growth (FQMG) process, was investigated. Pellets of YBa2Cu3O7-delta containing 0-30 weight percentage (wt.%) of Ag were quenched by LPG-O-2 flame melting and then crushed to obtain powder which was compacted and then subjected to a melt-growth process. As a result of this process, large grained, textured YBCO material was produced. It was found that YBCO samples with 10 wt.% Ag doped showed a transition temperature of 120 K and further increasing the Ag content caused a decrease of transition temperature. Using this modified quench-melt-growth technique, the reaction between crucibles and material can be completely avoided during the preparation of the precursor materials.