La2−xSrxCuO4−δ固溶体稳定性的热力学评价

2012 IEEE International Conference on Oxide Materials for Electronic Engineering (OMEE) Pub Date : 2012-09-01 DOI:10.1109/OMEE.2012.6464777

L. A. Tiphlova, A. S. Monayenkova, I. Romanova, V. Alyoshin

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引用次数: 0

摘要

合成了La2CuO4 - Sr2CuO3体系中的固溶体La2−xSrxCuO4−δ(0≤x(Sr)≤1.2)，并用x射线衍射和化学分析对其进行了表征。在298.15 K下，用密闭摆动等循环量热计测定了La2−xSrxCuO4−δ与1n盐酸的反应焓。根据热化学数据计算了吉布斯能。在x(Sr) > 0.6时，固溶体热力学不稳定。

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Thermodynamical assessment of stability La2−xSrxCuO4−δ solid solutions

The solid solutions La2−xSrxCuO4−δ (0 ≤ x(Sr) ≤ 1.2) in La2CuO4 - Sr2CuO3 system were synthesized and characterized by x-ray diffraction and chemical analyses. The enthalpies of reaction La2−xSrxCuO4−δ with 1 N hydrochloric acid were measured in hermetic swinging isoperibolic calorimeter at 298.15 K. The Gibbs energies were assessed from thermochemical data. It was estimated that the solid solution is thermodynamically unstable at x(Sr) > 0.6.

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来源期刊

2012 IEEE International Conference on Oxide Materials for Electronic Engineering (OMEE)

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