Bi-2223/Ag tapes prepared by high temperature sintering

Author

Xia, S.K. ; Lisboa, M.B. ; Serra, E.T. ; Rizzo, AndF

Author_Institution

Centro de Pesquisas de Energia Eletrica, CEPEL, Rio de Janeiro, Brazil

Volume

11

Issue

1

fYear

2001

fDate

3/1/2001 12:00:00 AM

Firstpage

2971

Lastpage

2974

Abstract

Heat treatments of Bi-2223/Ag tapes were performed through the continuous cooling sintering (CCS) method, by which the tapes are heated to high temperatures above the 2223 single-phase region, then cooled with a slow rate. The results indicated that the tapes prepared at higher temperature exhibit higher grain packing density and less porosity than those prepared at lower temperatures. As a result, the critical current density is improved. On the other hand, the tapes sintered at high temperatures contain more Pb-rich phases than those sintered at low temperatures. This drawback may be solved by controlling overall Pb concentration in precursor powders

Keywords

bismuth compounds; calcium compounds; critical current density (superconductivity); crystal microstructure; heat treatment; high-temperature superconductors; porosity; silver; sintering; strontium compounds; superconducting tapes; Bi₂₂Ca₂Cu₃O₈-Ag; Bi₂Sr₂Ca₂Cu₃O₈/Ag tapes; CCS method; Pb-rich phases; continuous cooling sintering; critical current density; grain packing density; heat treatment temperature; high temperature sintering; porosity; Carbon capture and storage; Cooling; Critical current density; Heat treatment; Microstructure; Powders; Superconducting films; Telephony; Temperature; X-ray scattering;

fLanguage

English

Journal_Title

Applied Superconductivity, IEEE Transactions on

Publisher

ieee

ISSN

1051-8223

Type

jour

DOI

10.1109/77.919686

Filename

919686