Structure and thermoelectric properties of Cs-Bi-Te alloys fabricated by different routes of reduction of oxide reagents |
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| Affiliation: | 1. State Key Laboratory for Modification of Chemical Fibers and Polymer Materials, College of Materials Science and Engineering, Donghua University, Shanghai 201620, China;2. Key Laboratory of Ministry of Education for Advanced Materials in Tropical Island Resources, School of Materials and Chemical Engineering, Hainan University, Haikou 570228, China;3. Institute of Functional Materials, Donghua University, Shanghai 201620, China;4. State Key Laboratory of High Performance Ceramics and Superfine Microstructure, Shanghai Institute of Ceramics, Chinese Academy of Sciences, Shanghai 200050, China;5. Department of Materials Processing, Graduate School of Engineering, Tohoku University, Sendai 980-8579, Japan |
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| Abstract: | Cesium-bismuth-telluride polycrystalline materials were fabricated using a cost-effective method based on a reduction of oxide reagents, leading to a production of a material with good thermoelectric properties. Several samples with various initial stoichiometry were prepared by melting of oxide powders at 1050 °C, quenching, milling to powders and then reducing in pure hydrogen at 400 °C. Another concept was to obtain the CsBi4Te6 material without a melting stage. Composition of the samples was analyzed by the XRD and EDX methods. The sample with 96% of CsBi4Te6 phase was obtained in a way of reduction of oxide reagents. Thermoelectric properties of fabricated samples were also investigated. |
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| Keywords: | Oxide materials Thermoelectric Solid state reaction Alloy |
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