The crystal structure and homogeneity range of the solid solutions in La–Sr–Co–Ni–O system

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• 作者：Gavrilova ; L.Ya. ; Teslenko ; Ya.V. ; Bannikch ; L.A. ; Aksenova ; T.V. ; Cherepanov ; V.A.
• 关键词：Electrode materials ; Gas&ndash ; solid reactions ; X-ray diffraction ; Thermal analysis
• 刊名：Journal of Alloys and Compounds
• 出版年：2002
• 期刊代码：45_09258388
• 类别：ms
• 出版时间：October 7, 2002
• 卷：344
• 期：1-2
• 页码：128-131
• 文件大小：421 K

摘要

Two types of samples of general composition: La_1−xSr_xCo_1−yNi_yO_3−δ and (La_1−xSr_x)₂Co_1−yNi_yO₄ with various values of x and y were prepared by standard ceramic technique. Final annealing was performed at 1100°C in air. Total duration of these anneals was 240–360 h. Identification of phase composition was made by powder XRD method. Crystal structure refinement was performed using Rietveld analysis. The homogeneity ranges of solid solutions were determined and presented in the composition fields.