Shift of tellurium solid-solubility limit and enhanced thermoelectric performance of bismuth antimony telluride milled with yttria-stabilized zirconia balls and vessels |
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| Affiliation: | 1. Department of Mechanical Science, Division of Science and Technology, Graduate School of Sciences and Technology for Innovation, Tokushima University, 2-1 Minamijyousanjima, Tokushima 770-8506, Japan;2. Graduate School of Advanced Technology and Sciences, Tokushima University, 2-1 Minamijyousanjima, Tokushima 770-8506, Japan;3. Department of Mechanical Science, Graduate School of Technology, Industrial and Social Sciences, Tokushima University, 2-1 Minamijyousanjima, Tokushima 770-8506, Japan;1. School of Materials Science and Engineering, Tiangong University, Tianjin 300387, China;2. Tianjin Key Laboratory of Advanced Fibers and Energy Storage, Tianjin 300387, China;1. SOKENDAI, 3-1-1, Yoshinodai, Chuo-ku, Sagamihara, Kanagawa, Japan;2. Japan Aerospace Exploration Agency, 3-1-1, Yoshinodai, Chuo-ku, Sagamihara, Kanagawa, Japan;1. Department of Conservation Science, the Palace Museum, Beijing, 100009, People’s Republic of China;2. Zhejiang Provincial Institute of Cultural Relics and Archaeology, Hangzhou, Zhejiang, 310013, People’s Republic of China;3. Object Department, the Palace Museum, Beijing, 100009, People’s Republic of China;1. University of Belgrade, Institute of Chemistry, Technology and Metallurgy, 12 Njego?eva St., 11000, Belgrade, Serbia;2. University of Belgrade, Vin?a Institute of Nuclear Science, 12-14 Mike Petrovi?a Alasa St., 11351, Vin?a, Belgrade, Serbia;3. University of Belgrade, Faculty of Technology and Metallurgy, 4 Karnegijeva St., 11000, Belgrade, Serbia |
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| Abstract: | As a thermoelectric material, Bi0.3Sb1.7Te3.0+x (x = 0?0.05) was fabricated by mechanical alloying using yttria-stabilized zirconia (YSZ) ceramic balls and vessels, followed by hot pressing. The effects of the added tellurium on the thermoelectric properties of Bi0.3Sb1.7Te3.0 fabricated with YSZ milling media were investigated. All sintered samples were isotropic and showed p-type conduction. The tellurium solid-solubility limit for Bi0.3Sb1.7Te3.0 was determined to be x = 0.01 by differential thermal analysis (DTA). The solid-solubility limit of the sample fabricated using YSZ was narrower than that of the congener prepared with Si3N4 balls and stainless-steel metal vessels. Among the evaluated compositions, the Bi0.3Sb1.7Te3.01 sintered disk had the highest dimensionless figure of merit, ZT = 1.30, at room temperature. This value was superior to that of Bi0.3Sb1.7Te3.0+x fabricated using metal vessels. Thus, selection of the milling media affected the optimum doping amount and maximum ZT. |
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| Keywords: | Hot pressing Milling Electrical properties Thermal conductivity Zirconia |
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