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- W2800244429 abstract "Ca-Co-O ceramics is typically p-type thermoelectric materials and possesses positive Seebeck coefficient. In this work, n-type Ca-Co-O ceramics with negative Seebeck coefficients were fabricated by sintering and annealing in a reducing atmosphere. The microstructures and thermoelectric properties of the ceramics were investigated. The results show that the carrier concentration and the carrier mobility dramatically increase after the samples were annealed in the reducing atmosphere. The electrical resistivity increases from 0.0663 mΩ·cm to 0.2974 mΩ·cm, while the negative Seebeck coefficients varies from −24.9 μV/K to −56.3 μV/K as the temperature increases from 323 K to 823 K, and the maximum power factor (PF, 1.536 mW/m·K2) is obtained at 623 K. The samples have n-type thermoelectric properties with large PF values and ZT value (ZT = 0.39, 823 K). The unusual results will pave a new way for studying Ca-Co-O thermoelectric ceramics." @default.
- W2800244429 created "2018-05-17" @default.
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- W2800244429 date "2018-06-01" @default.
- W2800244429 modified "2023-10-02" @default.
- W2800244429 title "Fabrication and thermoelectric properties of Ca-Co-O ceramics with negative Seebeck coefficient" @default.
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- W2800244429 doi "https://doi.org/10.1016/j.rinp.2018.04.044" @default.
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