Preparation of Ag-Doped NdBa2Cu3C7-δ Superconducting Ceramics by a Sol-Gel Method

G. Murakami, Y. Masuda, S. Fujihara, J. S. Jin, K. Tanabe, T. Kimura

Research output: Contribution to journalArticlepeer-review


Ag-doped NdBa2Cu3O7-δ (Nd123) superconducting ceramics were prepared by a sol-gel method using Nd(O-iC3H7)3, Ba(O-iC3H7)2, Cu(OH)2 and CH3COOAg as starting materials. Powders consisting of Nd123 and Ag (metal) were obtained by heating a calcined gel at 700°C in vacuum. The incongruent melting temperature of the Ag-doped Nd123 powders decreased probably due to interfacial reaction between Nd123 and Ag. Dense, sintered bodies could be prepared from the Ag-doped Nd123 powders through a heat-treatment process including incongruent melting. The sintered sample doped with 10mass% Ag showed Tc(onset) at 93 K and Tc(end) at 86 K after annealing in O2 at 400°C for 200 h. The improvement of the superconducting properties in Ag-doped Nd123 is attributed to densification of the samples by incongruent melting.

Original languageEnglish
Pages (from-to)121-126
Number of pages6
JournalKey Engineering Materials
Publication statusPublished - 1999 Jan 1

ASJC Scopus subject areas

  • Materials Science(all)
  • Mechanics of Materials
  • Mechanical Engineering


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