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- W4281692021 abstract "In this paper, thermoelectric (TE) properties of n-type InSb1-xBix (x = 0.00, 0.02, 0.05 and 0.10) polycrystalline samples, synthesized by single-step vacuum melting reaction, have been studied in the temperature range of 300–623 K. P-XRD confirms the phase purity and preferred orientation of (220) plane. FE-SEM back-scattered electron (BSE) micrographs reveal surface morphology and phase homogeneity, and elemental mapping with EDS is used to identify the chemical composition. The elemental existence and oxidation state of In3+, Sb3+, and Bi3+ in InSb1-xBix are rechecked through XPS analysis. With Bi substitution, the electrical conductivity of InSb increases, whereas Seebeck coefficient starts decreasing. However, the maximum Seebeck coefficient, S of −241 μV/K at 423 K, was achieved for the composition of InSb0.98Bi0.02. Interestingly, a huge reduction in lattice thermal conductivity, κlattice from ∼17.5 W/mK (InSb) to 13.1 W/mK (InSb0.9Bi0.10) at 300 K is observed due to increased phonon scattering from mass-fluctuation and created point defects. Further, the maximum thermoelectric figure of merit, zT was achieved as ∼0.56 at 623 K with higher Vickers micro-hardness values of ∼140 HV for the composition of InSb0.98Bi0.02 which is notably higher than the recently reported InSb based materials." @default.
- W4281692021 created "2022-06-13" @default.
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- W4281692021 date "2022-10-01" @default.
- W4281692021 modified "2023-09-24" @default.
- W4281692021 title "Isovalent Bi substitution induced low thermal conductivity and high thermoelectric performance in n-type InSb" @default.
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- W4281692021 doi "https://doi.org/10.1016/j.ceramint.2022.05.282" @default.
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