The synthesis conditions of a partial melting process for a bulk YBa2Cu3Ox (123) superconductor are discussed in terms of the microstructure and superconducting properties. The overall process consists of the partial melting, in which Y2BaCuO5 (211) and a liquid phase form, and subsequent slow cooling for the formation of the 123 grains by a peritectic reaction of 211 with liquid. Melt-quenched and sintered starting materials were examined to understand the difference in microstructural development. The finely and homogeneously dispersed 211 grains present in melt-quench-derived samples are considered to be effective in reducing defects by promoting a smooth and uniform peritectic reaction. As a result, melt-quench-derived materials showed better critical current densities than sinter-derived materials.
|Number of pages||6|
|Journal||Nippon Seramikkusu Kyokai Gakujutsu Ronbunshi/Journal of the Ceramic Society of Japan|
|Publication status||Published - 1989 Dec 1|
ASJC Scopus subject areas
- Ceramics and Composites
- Condensed Matter Physics
- Materials Chemistry