Impact of grain size on the Seebeck coefficient of bulk polycrystalline thermoelectric materials |
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Authors: | YuanWen Gao YueZhou He LinLi Zhu |
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Institution: | Key Laboratory of Mechanics on Western Disaster and Environment, Ministry of Education and College of Civil Engineering and Mechanics, Lanzhou University, Lanzhou 730000, China |
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Abstract: | Based on the Boltzmann transport equation of electrons and taking the scattering effect of electrons in the grain boundary as the boundary conditions of electrons transport in the grain, we presented a theoretical model for the Seebeck coefficient of bulk poly- crystalline thermoelectric materials, and applied it to studying the grain size effect on the Seebeck coefficient. Then we discussed the effects of transmissivity, temperature and the mean free path of electrons on the size effect. The results show t... |
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Keywords: | Seebeck coefficient size effect scattering effect bulk polycrystalline thermoelectric materials |
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