Effects of addition of oxide particles on formation and superconducting properties of the Bi-2212 phase

Masahiro Nagae, Jun Takada, Yoshihiro Kusano

Research output: Contribution to journalArticle

Abstract

Bi-2212/Ag tape samples with finely dispersed oxide(α-Al2O3 or MgO) particles were prepared by the partial melt-solidification technique. The formation and superconducting properties of the tape samples have been studied in relation to microstructure. In case of α-Al2O3 particles addition, as the oxide additive content increased, the Ic value at 77K and OT decreased remarkably because of reaction between α-Al2O3 and 2212 phase. On the other hand, MgO particles were uniformly dispersed in the Bi-2212 matrix without any reaction between 2212 phase and MgO, so that Ic almost unchanged. Isothermal magnetic hysteresis loop of MgO added samples was larger than that of non-added samples. These results suggested that MgO particle addition was effective for improvement in the flux pinning properties of the Bi-2212 phase.

Original languageEnglish
Pages (from-to)183-186
Number of pages4
JournalFuntai Oyobi Fummatsu Yakin/Journal of the Japan Society of Powder and Powder Metallurgy
Volume43
Issue number2
DOIs
Publication statusPublished - Feb 1996

Keywords

  • Bi-2212/Ag tape
  • Hysteresis loop
  • MgO particle addition
  • Partial melt-solidification technique
  • Particle size effect

ASJC Scopus subject areas

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

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