The Uncertainty Evaluation of Seebeck Coefficient of Thermoelectric Materials
LI Shuo1,GUO Tao2,YAO Ya-xuan1,REN Ling-ling1
1. Center for Advanced Measurement Science, National Institute of Metrology, Beijing 100029, China
2. School of Materials Science and Engineering, University of Science and Technology Beijing, Beijing 100083, China
Abstract：The thermoelectric materials are new functional materials, which can make the mutual transformation of thermal and electric energy directly. The Seebeck coefficient is the key parameter to evaluate the property of thermoelectric materials and its accurate measurement is very important. Based on the accurate measurement method, the traceability path of Seebeck coefficient was established, and the traceability of test apparatus were studied. The measurement uncertainty of P-type bismuth telluride Bi2Te3 bulk thermoelectric material was evaluated, and the relative expanded uncertainty was 0.46%～2.52% (k=2).
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2021, Vol. 42 
