High-Temperature X-Ray Measurements on Bi-Sr-Ca-Cu-O Superconductors in the Partially Melting States

Yoshio Oka, Naoichi Yamamoto, Youichi Tomii, Hitoshi Kitaguchi, Kiichi Oda, Jun Takada

Research output: Contribution to journalArticle

3 Citations (Scopus)

Abstract

High-temperature X-ray measurements were carreid out in the Bi-Sr-Ca-Cu-O system to investigate the partially melting states in which the high Tc phase (37 A phase) is produced by heat treatment. Two samples with 2212 and 4336 compositions were examined as the representatives of non-forming and forming the 37 A phase by heat treatment respectively. The inconguruent melting was found to take place in both samples to give new crystalline phases coexisting with liquid phases. It was noted that the new crystalline phases of the two samples were different from each other. It is thus suggested that the crystalline phase of the 4336 sample reacts with the liquid and the 30 A phases in the partially melting state to produce the 37 A phase. In the cooling process the 30 A phase was crystallized at the solidifying temperature and then the 24 A phase appeared at the lower temperature for both of the compositions.

Original languageEnglish
Pages (from-to)930-933
Number of pages4
JournalJournal of the Japan Society of Powder and Powder Metallurgy
Volume35
Issue number9
DOIs
Publication statusPublished - Jan 1 1988

ASJC Scopus subject areas

  • Mechanical Engineering
  • Industrial and Manufacturing Engineering
  • Metals and Alloys
  • Materials Chemistry

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