1. Effect of improved sol-gel method on composition and micro morphology of Ca3Co4O9
- Author
-
Ping Wu, Xiulan Huai, Shiping Zhang, Xuanye Hu, and Ya-nan Li
- Subjects
010302 applied physics ,Physics ,QC1-999 ,Hydrothermal treatment ,02 engineering and technology ,021001 nanoscience & nanotechnology ,Thermoelectric materials ,01 natural sciences ,Engineering physics ,chemistry.chemical_compound ,Grain distribution ,chemistry ,0103 physical sciences ,Thermoelectric effect ,Composition (visual arts) ,Composite material ,0210 nano-technology ,Citric acid ,Micro morphology ,Sol-gel - Abstract
Ca3 Co4 O9 is a potential high temperature thermoelectric material. We explore the hydrothermal treatment improved sol-gel method to prepare Ca3 Co4 O9 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%.
- Published
- 2017