Patent ID: 6311384
Filing Date: 2001-11-06
Classification: H01L,Y10S

Abstract:
A method of plastically working an Bi oxide superconductor into an Bi oxide superconducting wire, said method comprising steps in the following order:drawing said Bi oxide superconductor;performing a single-step flat rolling work on said Bi oxide superconductor at a draft of at least about 80% and not more than about 98%;then heat treating said Bi oxide superconductor;performing a second rolling work on said Bi oxide superconductor; andheat treating again on said Bi oxide superconductor, wherein said Bi oxide superconductor exhibits homogeneous critical current density and has an average critical current density of at least 2.2.times.10.sup.4 A/cm.sup.2.