Thermal expansion behaviour of Sr- and Mg-doped LaGaO3 solid electrolyte期刊界 All Journals 搜尽天下杂志传播学术成果专业期刊搜索期刊信息化学术搜索

Thermal expansion behaviour of Sr- and Mg-doped LaGaO3 solid electrolyte

Authors:	Pradyot Datta Peter Majewski Fritz Aldinger

Affiliation:	1. Technische Universität Clausthal, Institut für Metallurgie, 42 Robert-Koch Strasse, 38678 Clausthal-Zellerfeld, Germany;2. University of South Australia, School of Advanced Manufacturing and Mechanical Engineering, Mawson Lakes, South Australia 5095, Australia;3. Max-Planck-Institut für Metallforschung, Pulvermetallurgisches Laboratorium, Heisenbergstrasse 3, Stuttgart 70569, Germany;1. Centro Atómico Bariloche-Comisión Nacional de Energía Atómica (CAB-CNEA), Av. Ezequiel Bustillo 9500, R8402AGP San Carlos de Bariloche, Río Negro, Argentina;2. Consejo Nacional de Investigaciones Científicas y Técnicas (CONICET), Avenida Rivadavia 1917, C1033AAJ Buenos Aires, Argentina;3. Instituto Balseiro, Universidad Nacional de Cuyo, Av. Ezequiel Bustillo 9500, R8402AGP San Carlos de Bariloche, Río Negro, Argentina;1. MIIT Key Laboratory of Critical Materials Technology for New Energy Conversion and Storage, School of Chemistry and Chemical Engineering, Harbin Institute of Technology, Harbin 150001, PR China;2. School of Chemistry and Chemical Engineering, Henan Institute of Science and Technology, Xinxiang 453003, PR China;1. Hubei Collaborative Innovation Center for Advanced Materials, Faculty of Physics and Electronic Science, Hubei University, Wuhan, Hubei 430062, PR China;2. Department of Physics, COMSATS Institute of Information Technology, Lahore 54000, Pakistan;3. Faculty of Materials Science and Chemistry, China University of Geosciences (Wuhan), Wuhan 430074, China;4. Department of Energy Technology, Royal Institute of Technology, Stockholm SE-10044, Sweden;5. School of Aeronautical & Automotive Engineering, Loughborough University, Loughborough LE113TU, United Kingdom

Abstract:	Thermal expansion coefficients (TECs) of Sr- and Mg-doped LaGaO₃ were measured continuously from room temperature up to 1000 °C. It was observed that TECs increased with the increase in dopant concentration. In the continuous TEC curve depression due to a structural change from orthorhombic to rhombohedral of the material was also observed. It was found that at a given Sr content varying the amount of Mg content led to an increase in the phase transformation temperature whereas the reverse was found to be true with the increase in Sr content. The thermal expansion was found to increase with increasing oxygen vacancies irrespectively of the type of the dopant responsible for causing the vacancy. This increase was attributed to the weakening of the binding energy as a result of the creation of additional oxygen vacancies.

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