Abstract
The effect of Pb content and particle size of precursor powders has been studied to improve the grain growth and texture of Bi-2223/Ag tapes. The Pb content and particle size of precursor powders dominate the amount of liquid phases, and thus affect the value of J c with a variation of heat treatment condition. The best values of J c reached 53 kA/cm 2 at 77 K and 0 T, after 210 h heat treatment at 839 °C and two times intermediate pressing. It suggests that the improvement of J c characterized from high fraction of Bi-2223 with enlarged crystallites is attainable by optimizing the processing variables of precursor powders.
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