Chemical and Mechanical Stability of the High-Tc Phase in the Bi-Pb-Sr-Ca-Cu-O System (I) Effects of Heat Treatment of Crushed Powder of the High-Tc Phase

Jun Takada, Katsunori Hosotani, Masashi Fujiwara, Yoshihiro Kusano, Tokuro Nanba, Yasunori Ikeda, Mikio Takano

Research output: Contribution to journalArticle

Abstract

Chemical and mechanical stability of the high-Tc phase has been studied for the samples of Bi0.9Pb0.2Sr1.0Ca1.0Cu1.6Ox. Mechanical grinding converts the high-Tc phase into a nonsuperconducting amorphous phase. The ground high-Tc phase is not stabilized on annealing at lower temperatures below820»C. Annealing at lower temperature leads to precipitation of some impurity phases and the low-Tc phase which depends on annealing temperature and time. The high-Tc phase is recovered by annealing at 850»C. The lattice parameters a and c of the high-Tc phase annealed at 850»C are longer than those below 820»C.

Original languageEnglish
Pages (from-to)779-782
Number of pages4
JournalFuntai Oyobi Fummatsu Yakin/Journal of the Japan Society of Powder and Powder Metallurgy
Volume39
Issue number9
DOIs
Publication statusPublished - 1992

ASJC Scopus subject areas

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

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