Precipitation process for forming Bi-Pb-Sr-Ca-Cu-O superconductors by dissolving nitrate salts in acid and adding a solution of triethylamine and oxalic acid

摘要

A process for preparing powder of high temperature oxide superconductors of Bi-Pb-Sr-Ca-Cu-O type. In an aqueous solution of nitrate salts of Bi, Pb, Sr, Ca, and Cu metals, an appropriate ratio of triethylamine/oxalic acid was added to form a coprecipitate. Through the process of calcination at a temperature in the range of 750 DEG C. to 800 DEG C. and sintering at a temperature of 860 DEG C., a uniform and fine powder superconductive metal oxide having a critical temperature of 110K is obtained as the final product.