Preparation of Bi-Pb-Sr-Ca-Cu-O high-tc superconductor from coprecipitated oxalate

Kiichi Oda, Hitoshi Kitaguchi, Jun Takada, Akiyoshi Osaka, Yoshinari Miura, Yasunori Ikeda, Mikio Takano, Yoshichika Bando, Naoichi Yamamoto, Yoshio Oka, Yoichi Tomii, Teruyoshi Unesaki, Yasuo Takeda, Hiromasa Mazaki

Research output: Contribution to journalArticle

4 Citations (Scopus)

Abstract

Partial substitution of Pb for Bi in the Bi-Sr-Ca-Cu-O system has been found to increase sharply the volume fraction of the high-Tc phase when both the starting materials, coprecipitated oxalate being used in the present study, and the heating process are appropriate. The sharp powder X-ray diffraction pattern of the high-Tc phase was obtained from well-grown particles, 10∼20μm wide and 0.5μm thick typically. The electrical resistance dropped to zero at 107K within the experimental limit of 10-6Ω. A large diamagnetic response in the ac susceptibility due to the Meissner effect was seen below 120K. The fraction of the high-Tc phase over the low-Tc phase was roughly estimated to be 9/1 in volume.

Original languageEnglish
Pages (from-to)424-427
Number of pages4
JournalJournal of the Japan Society of Powder and Powder Metallurgy
Volume35
Issue number5
DOIs
Publication statusPublished - 1988

ASJC Scopus subject areas

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

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