Oxide superconductor thick film and method for manufacturing the same
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United States of America Patent
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Oct 26, 2004
Grant Date -
May 22, 2003
app pub date -
Aug 26, 2002
filing date -
Nov 22, 2001
priority date (Note) -
Expired
status (Latency Note)
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Abstract
The present invention provides an oxide superconductor thick film which is formed on a substrate or a board and has a high Jc and Ic and a method for manufacturing the same. Predetermined amounts of materials containing elements of Bi, Pb, Sr, Ca and Cu are weighed, mixed and subjected to steps of calcining, milling, and drying, and thereafter an organic binder and an organic vehicle are added thereto to prepare a (Bi, Pb).sub.2+a Sr.sub.2 Ca.sub.2 Cu.sub.3 O.sub.z, superconductive paste, which is applied to the surface of a substrate or a board in a thickness of 260 .mu.m or more and dried. Thereafter, the paste is first subjected to burning at temperatures of 835.degree. C. to 840.degree. C. for 100 hours, then pressurization, and further burning at temperatures of 835.degree. C. to 840.degree. C. for 100 hours, thereby preparing an oxide superconductor thick film having a film thickness of 130 .mu.m or more having a high Jc and Ic.
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