Abstract
The polycrystalline TiO2@TiC0.5−xO0.5+x ceramics with core-shell structure were prepared through the spark plasma sintering process. Both thermoelectric (TE) transport properties and microstructure of the ceramics were investigated. The TiO2 shell had a remarkable effect on the transport properties of the system. Large electrical conductivity and thermopower was observed in coating 15% TiO2@TiC0.5O0.5 sample. The maximum power factor is 8.1×10−4Wm−1K−2 and the corresponding ZT value is 0.3 at 873K for 15% TiO2@TiC0.5O0.5.
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