EFFECT OF BALL-MILLING ON Tc VALUES OF BI-BASED BULK SUPERCONDUCTORS*)


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Abstract

Superconducting powders were synthesised by solid-state reaction. They were ball-milled, and pressed into pellets. It was found that particle size prior to sintering has a substantial influence on the properties of Bi-based bulk superconductors, such as reactivity, phase homogeneity and Tc values. Powders of fine particle size were found to show low Tc values.

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