Thermoelectric properties of Zn- and Ce-alloyed In2O3and the effect of SiO2nanoparticle additives

Cheng Lun Hsin, Jen Che Hsiao, You Ming Chen, Sheng-Wei Lee

研究成果: 雜誌貢獻期刊論文同行評審

摘要

Thermoelectric materials are considered promising candidates for thermal energy conversion. This study presents the fabrication of Zn- and Ce-alloyed In2O3 with a porous structure. The electrical conductivity was improved by the alloying effect and an ultra-low thermal conductivity was observed owing to the porous structure, which concomitantly provide a distinct enhancement of ZT. However, SiO2 nanoparticle additives react with the matrix to form a third-phase impurity, which weakens the electrical conductivity and increases the thermal conductivity. A thermoelectric module was constructed for the purpose of thermal heat energy conversion. Our experimental results proved that both an enhancement in electrical conductivity and a suppression in thermal conductivity could be achieved through nano-engineering. This approach presents a feasible route to synthesize porous thermoelectric oxides, and provides insight into the effect of additives; moreover, this approach is a cost-effective method for the fabrication of thermoelectric oxides without traditional hot-pressing and spark-plasma-sintering processes.

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文章編號135712
期刊Nanotechnology
33
發行號13
DOIs
出版狀態已出版 - 26 3月 2022

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