The patent badge is an abbreviated version of the USPTO patent document. The patent badge does contain a link to the full patent document.
The patent badge is an abbreviated version of the USPTO patent document. The patent badge covers the following: Patent number, Date patent was issued, Date patent was filed, Title of the patent, Applicant, Inventor, Assignee, Attorney firm, Primary examiner, Assistant examiner, CPCs, and Abstract. The patent badge does contain a link to the full patent document (in Adobe Acrobat format, aka pdf). To download or print any patent click here.
Patent No.:
Date of Patent:
May. 19, 1998
Filed:
Dec. 16, 1993
Yoshio Kubo, Amagasaki, JP;
Kunihiko Egawa, Amagasaki, JP;
Hiroko Higuma, Amagasaki, JP;
Takayuki Nagai, Amagasaki, JP;
Fusaoki Uchikawa, Amagasaki, JP;
Mitsubishi Denki Kabushiki Kaisha, Tokyo, JP;
Abstract
A compound superconducting wire comprising a matrix of CuX alloy and a multiplicity of Z.sub.3 X filaments embedded in the matrix in a spaced relationship so as not to come into contact with each other wherein X is Sn or Ga and Z.sub.3 X is Nb.sub.3 Sn or V.sub.3 Ga. In a precursor, therefore, a multiplicity of filaments of a base metal material Z such as Nb are arranged in a Cu base metal metrix concentrically in layers around a center core of a base metal material X such as Sn, in which the spacing between any adjacent filaments arranged in a former boundary region of an .epsilon.-phase bronze layer having a certain radius from the center produced when the precursor is preheat-treated at a temperature of 300.degree. to 600.degree. C. is made larger than the spacing between any adjacent filaments arranged in the other matrix regions. Also disclosed is a precursor wire wherein a composite of a Cu base metal material and a base metal material X capable of forming an alloy with the Cu base metal material is used as a matrix without arranging a core of the base metal material X at the center, and a multiplicity of filaments of a base metal material Z are embedded in the composite in a spaced relationship.