Microfilamentary conductor based on Bi(2212)

Author

Miller, T.A. ; Schwartzkopf, L.A. ; Ostenson, J.E. ; Finnemore, D.K. ; Righi, J. ; Gleixner, R.A. ; Zeigler, D.

Author_Institution

Iowa State Univ., Ames, IA, USA

Volume

27

Issue

2

fYear

1991

fDate

3/1/1991 12:00:00 AM

Firstpage

909

Lastpage

911

Abstract

A series of ex situ prepared microfilamentary conductors has been prepared to determine the optimum heat treatment sequence for the development of a strain-tolerant microfilamentary conductor based on Bi ₂Sr₂Ca₁Cu₂O_8-δ. Both monolithic tapes and the microfilamentary composites were prepared so that the difference between the two methods for the same heat treatment could be evaluated. The monolithic tapes are easy to fabricate and are used to provide a rough guide to the desired degree of melting and the optimum oxygen concentration needed for the highest critical current densities. One of the ex situ microfilamentary composites showed a critical current density of 5000 A/cm² at 4.2 K while subjected to a strain exceeding 1%

Keywords

bismuth compounds; calcium compounds; composite superconductors; critical current density (superconductivity); high-temperature superconductors; strontium compounds; Bi₂Sr₂Ca₁Cu₂O _8-δ; high temperature superconductor; highest critical current densities; microfilamentary conductors; monolithic tapes; Capacitive sensors; Conductors; Critical current density; Heat treatment; Laboratories; Optimized production technology; Physics; Shape; Temperature; Yarn;

fLanguage

English

Journal_Title

Magnetics, IEEE Transactions on

Publisher

ieee

ISSN

0018-9464

Type

jour

DOI

10.1109/20.133323

Filename

133323