The formation process of Li-added Bi-2212 phase

Masashi Fujiwara, Takeyuki Kikuchi, Masahiro Nagae, Hideki Nakajima, Jun Takada

Research output: Contribution to journalArticlepeer-review

Abstract

Effects of the Li-addition to the Bi-2212 phase on the formation process and the superconductive properties were studied for the samples with the nominal compositions of Bi : Sr : Ca : Cu : Li = 2 : 1.5 : 1.5 : 2 : x(x=0 to 0.6). The samples were heated at 560-860°C for 1 to 48h in air. Monophasic Bi-2212 samples was obtained for x=0.2 to 0.6 by heating above 730°C, which was approximately 100°C lower than that of the sample with x=0. A new compound containing Li element was formed in the temperature range between 700 and 720°C, which remarkably promoted the formation of the Bi-2212 phase. The lattice parameter c of the Bi-2212 phase increase with increasing Li content. The temperature dependence of magnetic susceptibility showed that Tc rose up to 90K for the sample with x=0.4 heated at 750°C for 12h.

Original languageEnglish
Pages (from-to)178-182
Number of pages5
JournalFuntai Oyobi Fummatsu Yakin/Journal of the Japan Society of Powder and Powder Metallurgy
Volume43
Issue number2
DOIs
Publication statusPublished - Feb 1996

Keywords

  • 2212 phase
  • Formation process
  • Lattice parameter
  • Li-addittion
  • Oxygen content
  • Tc

ASJC Scopus subject areas

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

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