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- W2799693506 abstract "Nb-doped SrTiO3 thermoelectric ceramics with different niobium concentrations, sintering temperatures and Sr-site vacancies are successfully prepared by high energy ball milling combined with carbon burial sintering. For fully understanding the effect of niobium doping on SrTiO3, thermoelectric transport properties are systematically investigated in a temperature range from 300 K to 1100 K. The carrier mobility can be significantly enhanced, and the electrical conductivity is quadrupled, when the sintering temperature rises from 1673 K to 1773 K (beyond the eutectic temperature (1713 K) of SrTiO3–TiO2). The lattice vibration can be suppressed by the lattice distortion introduced by the doped niobium atoms. However, Sr-site vacancies compensate for the lattice distortion and increase the lattice thermal conductivity more or less. Finally, we achieve a maximum value of figure-of-merit zT of 0.21 at 1100 K for SrTi0.9Nb0.1O3 ceramic sintered at 1773 K." @default.
- W2799693506 created "2018-05-17" @default.
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- W2799693506 date "2018-04-01" @default.
- W2799693506 modified "2023-09-25" @default.
- W2799693506 title "Effect of Nb doping on microstructures and thermoelectric properties of SrTiO <sub>3</sub> ceramics" @default.
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- W2799693506 doi "https://doi.org/10.1088/1674-1056/27/4/047205" @default.
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