Crystallization process in fast-quenched Bi-Sr-Ca-Cu-O

Yoshio Oka, Naoichi Yamamoto, Yoichi Tomii, Hitoshi Kitaguchi, Kiichi Oda, Jun Takada

Research output: Contribution to journalArticle

Abstract

As a rule crystallization of amorphous Bi 2Sr 2CaCu 2O y leads to the 24 angstrom phase followed by formation of the 30 angstrom phase above 800°C. The nominal composition of the 24 angstrom phase is Bi 2Sr 2CuO y hence crystallization into the 24 angstrom phase causes a discrepancy in composition. In order to solve the problem, crystallization of rapidly quenched Bi 2Sr 2CaCu 2O y has been examined using X-ray diffraction and SEM-EDX. Crystallization of amorphous Bi 2Sr 2CaCu 2O y into the 24 angstrom phase was accompanied by phase separation into the 24 angstrom and a Cu-rich region so as to adjust the composition. In the next step of crystallization, the separated regions reacted together above 800°C into the 30 angstrom phase.

Original languageEnglish
Pages (from-to)493-496
Number of pages4
JournalFuntai Oyobi Fummatsu Yakin/Journal of the Japan Society of Powder and Powder Metallurgy
Volume36
Issue number5
Publication statusPublished - Jul 1989
Externally publishedYes

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Crystallization
Chemical analysis
Phase separation
Energy dispersive spectroscopy
X ray diffraction
Scanning electron microscopy

ASJC Scopus subject areas

  • Mechanical Engineering
  • Metals and Alloys

Cite this

Oka, Y., Yamamoto, N., Tomii, Y., Kitaguchi, H., Oda, K., & Takada, J. (1989). Crystallization process in fast-quenched Bi-Sr-Ca-Cu-O. Funtai Oyobi Fummatsu Yakin/Journal of the Japan Society of Powder and Powder Metallurgy, 36(5), 493-496.

Crystallization process in fast-quenched Bi-Sr-Ca-Cu-O. / Oka, Yoshio; Yamamoto, Naoichi; Tomii, Yoichi; Kitaguchi, Hitoshi; Oda, Kiichi; Takada, Jun.

In: Funtai Oyobi Fummatsu Yakin/Journal of the Japan Society of Powder and Powder Metallurgy, Vol. 36, No. 5, 07.1989, p. 493-496.

Research output: Contribution to journalArticle

Oka, Y, Yamamoto, N, Tomii, Y, Kitaguchi, H, Oda, K & Takada, J 1989, 'Crystallization process in fast-quenched Bi-Sr-Ca-Cu-O', Funtai Oyobi Fummatsu Yakin/Journal of the Japan Society of Powder and Powder Metallurgy, vol. 36, no. 5, pp. 493-496.
Oka, Yoshio ; Yamamoto, Naoichi ; Tomii, Yoichi ; Kitaguchi, Hitoshi ; Oda, Kiichi ; Takada, Jun. / Crystallization process in fast-quenched Bi-Sr-Ca-Cu-O. In: Funtai Oyobi Fummatsu Yakin/Journal of the Japan Society of Powder and Powder Metallurgy. 1989 ; Vol. 36, No. 5. pp. 493-496.
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