Phase equilibria in the CaO-SrO-CuO system ({>=}70 mol % CuO)
- Samara Technical Univ. (Russian Federation); and others
The temperature dependence of interactions between constituent components is among factors responsible for the effect of synthesis temperature on properties of oxide superconductors. The oxides of the CaO-SrO-CuO system are involved in the formation of bismuth-containing superconducting phases. In most works, the CaO-SrO-CuO system was studied in the subsolidus region; the discrepancy between the available results is primarily associated with the difference in synthesis temperatures used. The authors showed that peritectic decomposition of the ternary solid solutions occurs in the ranges 980-985{degrees}C for [(Sr{sub 1-x}Ca{sub x}){sub 3}(Cu{sub 5}){sub n}], 1000-1084{degrees}C for [(Sr{sub 1 - x}Ca{sub x}){sub 2}CuO{sub 3}]. Decomposition of the tetragonal solid solution at 980{degrees}C yields three phases: CuO and two last solid solutions with Ca-rich compositions. In this work, the authors studied the CuO-rich part of the CaO-SrO-CuO system.
- OSTI ID:
- 161913
- Journal Information:
- Inorganic Materials, Journal Name: Inorganic Materials Journal Issue: 7 Vol. 31; ISSN 0020-1685; ISSN INOMAF
- Country of Publication:
- United States
- Language:
- English
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