Reactive sintering for oriented and connected Bi-2223 superconductive oxides from a mixture of delaminated Bi-2212 and fine powdered supplemental ingredients

Takenori Kashimura, Tetsuhiko Isobe, Mamoru Senna, Mitsuru Itoh, Tsutomu Koizumi

Research output: Contribution to journalArticle

7 Citations (Scopus)

Abstract

For the purpose of obtaining high critical current densities (Jc), well-oriented and connected Bi-2223 was prepared by improved processing techniques, i.e., (i) delamination by mild, wet grinding of a mixture of Bi-2212 and a supplemental phase containing Pb, Sr, Ca and Cu; (ii) preparation of green sheets by casting the slurry on a thin silver plate using an applicator bar; (iii) compression of the green sheet and calcination at 800°C in air; and (iv) firing at 827°C in 7% O2-Ar gas flow. Holding samples under compression in each processing step after delamination promoted grain growth, degree of orientation, fraction of Bi-2223 and, accordingly, better connectivity of the grain colonies.

Original languageEnglish
Pages (from-to)297-304
Number of pages8
JournalPhysica C: Superconductivity and its applications
Volume270
Issue number3-4
DOIs
Publication statusPublished - 1996 Oct 20

Keywords

  • Bi-2223
  • Delamination
  • Green sheet densification
  • Quantitative analysis of texture
  • Reactive sintering

ASJC Scopus subject areas

  • Electronic, Optical and Magnetic Materials
  • Condensed Matter Physics
  • Energy Engineering and Power Technology
  • Electrical and Electronic Engineering

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