PRODUCTION OF TL-PB-SR-CA-CU-O TYPE OXIDE SUPERCONDUCTOR

摘要

PURPOSE:To produce safely a Tl-Pb-Sr-Ca-Cu-O type oxide superconductor having stable quality by allowing a mixture consisting of compds. of Pb, Sr, Ca, Cu and O to react with a Tl compd. CONSTITUTION:The mixture of compds. consisting of Pb, Sr, Ca, Cu and O is produced previously, and the aimed Tl-Pb-Sr-Ca-Cu-O type oxide superconductor is obtd. by allowing the mixture to react with the Tl compd. A compsn. of a finally obtd. Tl-Pb-Sr-Ca-Cu-O type oxide superconductor is expressed by the formula, wherein 0.5=a=3; 0.5=b=2; 1=c; m=3; 1=n=4; 4.25=x=19.5. When values of a, b, c, m, n and x are outside of the above-described ranges, obtd. oxide superconductors may sometimes have undesirably no superconductivity. All starting materials to be used are those having =99%, pref. =99.9% purity.