Abstract
Refining behavior of the Pb-substituted Bi-2223 phase through mechanical grinding and thermal behavior of its ground powder on heating in air have been examined for samples with a nominal composition of Bi 1.8Pb 0.4Sr 2Ca 2Cu 3.2O z by XRD, DTA, SEM, TEM, ED and magnetic measurements. The 2223 phase easily changes into superfine powder by mechanical grinding. On annealing the ground powder below 800°C, various second phases were formed, while at 850°C the 2223 phase was reformed depending upon the amount of the superfine powder in the samples.
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