Chinese Physics B, Volume. 29, Issue 10, (2020)
Grain size and structure distortion characterization of α-MgAgSb thermoelectric material by powder diffraction
Nanostructuring, structure distortion, and/or disorder are the main manipulation techniques to reduce the lattice thermal conductivity and improve the figure of merit of thermoelectric materials. A single-phase α-MgAgSb sample, MgAg0.97Sb0.99, with high thermoelectric performance in near room temperature region was synthesized through a high-energy ball milling with a hot-pressing method. Here, we report the average grain size of 24–28 nm and the accurate structure distortion, which are characterized by high-resolution neutron diffraction and synchrotron x-ray diffraction with Rietveld refinement data analysis. Both the small grain size and the structure distortion have a contribution to the low lattice thermal conductivity in MgAg0.97Sb0.99.
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Xiyang Li, Zhigang Zhang, Lunhua He, Maxim Avdeev, Yang Ren, Huaizhou Zhao, Fangwei Wang. Grain size and structure distortion characterization of α-MgAgSb thermoelectric material by powder diffraction[J]. Chinese Physics B, 2020, 29(10):
Received: May. 21, 2020
Accepted: --
Published Online: Apr. 21, 2021
The Author Email: Wang Fangwei (fwwang@iphy.ac.cn)