期刊
JOURNAL OF INORGANIC MATERIALS
卷 25, 期 6, 页码 561-568出版社
SCIENCE PRESS
DOI: 10.3724/SP.J.1077.2010.00561
关键词
thermoelectric; microstructure; nano-composite; scattering; review
Microstructure engineering is an effective avenue for tuning the thermal and electrical transports to optimize thermoelectric (TE) properties. Thermoelectric composites with nano-particle dispersion have been successfully developed by using extrinsic or in-situ formation methods. The lattice thermal conductivity can be depressed by the scattering effects of nano particles to the medium-long-wavelength phonons. The enhanced electron density of states at the Fermi level and the carrier filtering effects caused by the nano-sized grain boundary are also positive for enhancing Seebeck coefficients. The mixing, in-situ oxidation and phase-separation precipitation process supply possibility to realize the nano-particle dispersed structure for different material systems. This paper reviews the recent progress of the research on nano-structured and nano-composite thermoelectric materials. The effects of the nano-dispersion on the electrical and thermal transports will be also discussed.
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