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We report on the study of (Bi,Pb)2Sr2Ca2Cu3Ox(Bi-2223) precursor powder prepared by oxalate coprecipitation, which mainly focus on the process parameters and heat treatment for large-quantity preparation. Three kilograms of powder with a high homogeneity and an ideal composition can be prepared in one batch by controlling the pH value (2.9) and the aging time (2 days) of mixed solutions. Meanwhile,...
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