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- W2622038197 abstract "p-type Bi0.5Sb1.5Te3 bulks were prepared from different original sizes of 36–203 μm by the resistance pressing sintering (RPS) method. It was demonstrated that the original powder refinement introduces lattice defects and facilitates a donor-like effect, resulting in a decrease of the carrier concentration and an increase of the effective mass of the carrier. The finer the original powder is, the higher the electrical resistivity and Seebeck coefficient are, and the lower the thermal conductivity is. Although the sintered sample from the smallest sized powders possessed the minimum thermal conductivity, its figure of merit was unsatisfactory due to the low electrical transport performance, and the sintered sample from the 200 ~ 300 meshed original powders obtained a maximum figure-of-merit of 0.95 at 340 K. In addition, it was observed that the phenomenon of nonlinear change in electrical transport performance with initial powder refinement was due to the percolation effect. In short, the present work confirms that the initial powder size has a great influence on the thermoelectric properties of Bi2Te3-based materials, which should be taken seriously in our follow-up work." @default.
- W2622038197 created "2017-06-15" @default.
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- W2622038197 date "2017-06-08" @default.
- W2622038197 modified "2023-10-16" @default.
- W2622038197 title "The initial powder-refinement-induced donor-like effect and nonlinear change of thermoelectric performance for Bi<sub>2</sub>Te<sub>3</sub>-based polycrystalline bulks" @default.
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- W2622038197 doi "https://doi.org/10.1088/1361-6641/aa6b89" @default.
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