Effects of substrate material addition on the texturing and properties of melting-growth YBa 2 Cu 3 O 7-δ superconductors

S. J. Wang*, C. L. Wu, Jenh-Yih Juang

*Corresponding author for this work

Research output: Contribution to journalArticle

Abstract

This paper reports a novel process for preparing well-textured bulk Y 1 Ba 2 Cu 3 O 7-δ (YBCO) superconductors. It is found that the addition of ZrO 2 has been very effective in acting as the nucleation sites for promoting the oriented growth of superconducting YBCO during peritectic solidification. Extended regions of well-textured YBCO grains with the superior superconducting properties of the YBCO bulk are readily obtained by a single-step melt process at much lower process temperatures, as compared to other processes such as melt-texturing-growth (MTG) and melt-quench-melt-growth (MQMG) previously reported. At 77 K, the plate-like Josephson weak-link behaviors observed in pure melt-processed YBCO have been effectively eliminated by the present method, indicating that the coherency between the spherulitic superconducting YBCO grains may have been greatly improved ZrO 2 additions. It is anticipated that, with further optimizations on process parameters, the present much simplified process will have important implications for obtaining the much desired grain structures for practical applications of this material.

Original languageEnglish
Pages (from-to)173-180
Number of pages8
JournalProceedings of the National Science Council, Republic of China, Part A: Physical Science and Engineering
Volume19
Issue number3
StatePublished - 1 May 1995

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