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- W2897042977 abstract "The structural and thermoelectric properties of Na- and Ag-substituted CoO dense ceramics have been investigated. X-ray diffraction shows that pure phase and Ag/CoO composites have been obtained for Na-doped and Ag-doped CoO, respectively. Raman spectroscopy shows an effect of Na dopants on the lattice disorder of CoO. The chemical composition, element distribution, and valence states of the samples have been characterized by Auger electron microscopy and X-ray photoelectron spectroscopy. Substitution of Co by 5 at. % Na enhances the power factor to 250 μW m−1 K-2 at 1000 K, similar to that of Ca3Co4O9. The corresponding thermal conductivity is also reduced to 3.55 W.m−1 K−1 at 1000 K. Consequently, Co0.95Na0.05O exhibits the best thermoelectric figure of merit (ZT), which is 0.07 at 1000 K. On the other hand, the substitution of Ag into CoO leads to the formation of CoO/Ag composites and deteriorates ZT values." @default.
- W2897042977 created "2018-10-26" @default.
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- W2897042977 date "2019-02-01" @default.
- W2897042977 modified "2023-10-16" @default.
- W2897042977 title "Synthesis, sintering, and thermoelectric properties of Co1-M O (M = Na, 0 ≤ x ≤ 0.07; M = Ag, 0 ≤ x ≤ 0.05)" @default.
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- W2897042977 doi "https://doi.org/10.1016/j.jeurceramsoc.2018.10.013" @default.
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