Effect of improved sol-gel method on composition and micro morphology of Ca3Co4O9
1 University of Science and Technology Beijing, School of mathematics and Physics, Beijing 100083, China
2 Beijing Key Laboratory for Magneto-Photoelectrical Composite and Interface Science, Beijing 100083, China
3 Chinese Academy of Sciences, Institute of Engineering Thermophysics, Beijing 100190, China
* Corresponding author: firstname.lastname@example.org
Published online: 30 June 2017
Ca3Co4O9 is a potential high temperature thermoelectric material. We explore the hydrothermal treatment improved sol-gel method to prepare Ca3Co4O9 thermoelectric materials. We find that this treatment can increase the thermoelectric performance of the samples compared with the conventional citric acid sol-gel method. We also find the samples prepared by the improved sol-gel method have more uniform grain distribution, better densification, and less voids. At about 1000K, compared with the conventional sol-gel method, the power factor of the samples prepared by improved sol-gel method improves about 168%.
© The Authors, published by EDP Sciences, 2017
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