Phase Composition and Compatibilities in the Bi‐Sr‐Ca‐Cu Quaternary Oxide System at 800°C in Air

Byungsun Hong; Joon Hahn; Thomas O Mason

doi:10.1111/j.1151-2916.1990.tb05253.x

Phase Composition and Compatibilities in the Bi‐Sr‐Ca‐Cu Quaternary Oxide System at 800°C in Air

Byungsun Hong^*, Joon Hahn, Thomas O Mason

^*Corresponding author for this work

Materials Science and Engineering

Research output: Contribution to journal › Article › peer-review

90 Scopus citations

Abstract

Subsolidus phase relations in the system (Bi‐Sr‐Ca‐Cu)‐O at 800°C were investigated via powder X‐ray diffraction and electron probe microanalysis of solid‐state reaction products. Two recently reported (Bi‐Sr‐Ca)‐O phases were detected in quaternary assemlages and had the approximate cation stoichiometries of 9115 and 825. The only truly quaternary compound detected is the superconducting phase with the cation stoichiometry 2212. Tie lines, tie triangles, and compatibility tetrahedra involving this phase and the 2201 superconducting phase were determined. Both superconducting compounds exhibit small but detectable Sr‐to‐Ca solubility and are Sr‐deficient with respect to the “ideal” formulas.

Original language	English (US)
Pages (from-to)	1965-1972
Number of pages	8
Journal	Journal of the American Ceramic Society
Volume	73
Issue number	7
DOIs	https://doi.org/10.1111/j.1151-2916.1990.tb05253.x
State	Published - Jan 1 1990

Keywords

composition
phase diagrams
phases
solid solutions
superconductors

ASJC Scopus subject areas

Ceramics and Composites
Geology
Geochemistry and Petrology
Materials Chemistry

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10.1111/j.1151-2916.1990.tb05253.x

Cite this

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abstract = "Subsolidus phase relations in the system (Bi‐Sr‐Ca‐Cu)‐O at 800°C were investigated via powder X‐ray diffraction and electron probe microanalysis of solid‐state reaction products. Two recently reported (Bi‐Sr‐Ca)‐O phases were detected in quaternary assemlages and had the approximate cation stoichiometries of 9115 and 825. The only truly quaternary compound detected is the superconducting phase with the cation stoichiometry 2212. Tie lines, tie triangles, and compatibility tetrahedra involving this phase and the 2201 superconducting phase were determined. Both superconducting compounds exhibit small but detectable Sr‐to‐Ca solubility and are Sr‐deficient with respect to the “ideal” formulas.",

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N2 - Subsolidus phase relations in the system (Bi‐Sr‐Ca‐Cu)‐O at 800°C were investigated via powder X‐ray diffraction and electron probe microanalysis of solid‐state reaction products. Two recently reported (Bi‐Sr‐Ca)‐O phases were detected in quaternary assemlages and had the approximate cation stoichiometries of 9115 and 825. The only truly quaternary compound detected is the superconducting phase with the cation stoichiometry 2212. Tie lines, tie triangles, and compatibility tetrahedra involving this phase and the 2201 superconducting phase were determined. Both superconducting compounds exhibit small but detectable Sr‐to‐Ca solubility and are Sr‐deficient with respect to the “ideal” formulas.

AB - Subsolidus phase relations in the system (Bi‐Sr‐Ca‐Cu)‐O at 800°C were investigated via powder X‐ray diffraction and electron probe microanalysis of solid‐state reaction products. Two recently reported (Bi‐Sr‐Ca)‐O phases were detected in quaternary assemlages and had the approximate cation stoichiometries of 9115 and 825. The only truly quaternary compound detected is the superconducting phase with the cation stoichiometry 2212. Tie lines, tie triangles, and compatibility tetrahedra involving this phase and the 2201 superconducting phase were determined. Both superconducting compounds exhibit small but detectable Sr‐to‐Ca solubility and are Sr‐deficient with respect to the “ideal” formulas.

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KW - phase diagrams

KW - phases

KW - solid solutions

KW - superconductors

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Phase Composition and Compatibilities in the Bi‐Sr‐Ca‐Cu Quaternary Oxide System at 800°C in Air

Abstract

Keywords

ASJC Scopus subject areas

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