Thermal stability and high temperature polymorphism of topochemically-prepared Dion-Jacobson triple-layered perovskites

被引：0
|
作者：
Guertin, Stephen L. [1 ]
Josepha, Elisha A. [1 ]
Montasserasadi, Dariush [1 ]
Wiley, John B. [1 ]
机构：
[1] Department of Chemistry, Advanced Materials Research Institute, University of New Orleans, 2000 Lakeshore Dr., New Orleans,LA,70148, United States
来源：
Journal of Alloys and Compounds | 2015年 / 647卷
基金：
美国国家科学基金会;
关键词：
Calorimeters - Differential scanning calorimetry - Ion exchange - Perovskite - Thermogravimetric analysis - Copper compounds - Thermodynamic stability - X ray powder diffraction;
D O I：
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学科分类号：
摘要：
The thermal stability of six Dion-Jacobson-related triple layered perovskites, ACa2Nb3O10 (A = H, NH4, Li, Na, K, CuCl), was explored to 1000 °C. Each compound was produced topochemically by low-temperature (2Nb3O10. The thermal behavior of the series was examined by variable temperature X-ray powder diffraction experiments in tandem with thermogravimetric analysis and differential scanning calorimetry. Five of the species were found to be low temperature/metastable phases, decomposing below 900 °C, where the stability of the series decreased with decreasing interlayer cation size. The compounds, A = Li, Na, K, exhibited high temperature polymorphism, with a completely reversible transition evident for KCa2Nb3O10. © 2015 Elsevier B.V.
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页码：370 / 374
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