Effect of Sb2O3 addition on the formation of the superconductive phases in Bi-Pb-Sr-Ca-Cu-O systems

Kentaro Ohhashi, Setsuo Yada, Shigeharu Naka, Hideaki Itoh, Hitoshi Kitaguchi, Jun Takada, Yoichi Tomii, Yasunori Ikeda, Mikio Takano

Research output: Contribution to journalArticle

1 Citation (Scopus)

Abstract

Specimens of (M2.1) Sr2.0Ca2.0Cu3.15Oy [(M2.1) = (Bi2.1-m-zPbmSbz):0.1≤m≤0.5, 0≤z≤ 0.4)] were sintered at 830, 840 or 850°C for 20hr after pre-treatment (20hr) and heating processes [I (20hr) and II (40hr) using envelope method] at the same temperature in air atmosphere. XRD patterns and resistance curves were compared in order to find effects of Sb2O3 addition on the formation of high-Tc phase. The optimum heat treatment temperature was 840°C, which was a little lower than that of specimens without Sb3+ (z=0), and the range of treatment temperature forming high-Tc phase becomes narrower. In a reaction diagram at 840°C, high-Tc phase amounted to 70-80% for 20-40hr at a small content of Sb3+:z≤0.2, although a single phase of high-Tc was not obtained. For specimen with Sb3+ addition, the formation time of high-Tc phase was reduced in such a composition range. A special case was observed in the specimens with Bi content of 1.75 approximately 1.80mol.

Original languageEnglish
Pages (from-to)747-750
Number of pages4
JournalFuntai Oyobi Fummatsu Yakin/Journal of the Japan Society of Powder and Powder Metallurgy
Volume37
Issue number5
Publication statusPublished - Jul 1990
Externally publishedYes

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Industrial heating
Temperature
Heat treatment
Air
Chemical analysis

ASJC Scopus subject areas

  • Mechanical Engineering
  • Metals and Alloys

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Effect of Sb2O3 addition on the formation of the superconductive phases in Bi-Pb-Sr-Ca-Cu-O systems. / Ohhashi, Kentaro; Yada, Setsuo; Naka, Shigeharu; Itoh, Hideaki; Kitaguchi, Hitoshi; Takada, Jun; Tomii, Yoichi; Ikeda, Yasunori; Takano, Mikio.

In: Funtai Oyobi Fummatsu Yakin/Journal of the Japan Society of Powder and Powder Metallurgy, Vol. 37, No. 5, 07.1990, p. 747-750.

Research output: Contribution to journalArticle

Ohhashi, K, Yada, S, Naka, S, Itoh, H, Kitaguchi, H, Takada, J, Tomii, Y, Ikeda, Y & Takano, M 1990, 'Effect of Sb2O3 addition on the formation of the superconductive phases in Bi-Pb-Sr-Ca-Cu-O systems', Funtai Oyobi Fummatsu Yakin/Journal of the Japan Society of Powder and Powder Metallurgy, vol. 37, no. 5, pp. 747-750.
Ohhashi, Kentaro ; Yada, Setsuo ; Naka, Shigeharu ; Itoh, Hideaki ; Kitaguchi, Hitoshi ; Takada, Jun ; Tomii, Yoichi ; Ikeda, Yasunori ; Takano, Mikio. / Effect of Sb2O3 addition on the formation of the superconductive phases in Bi-Pb-Sr-Ca-Cu-O systems. In: Funtai Oyobi Fummatsu Yakin/Journal of the Japan Society of Powder and Powder Metallurgy. 1990 ; Vol. 37, No. 5. pp. 747-750.
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