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Thermoelectric properties of lantanide doped Sr0.7Ba0.3Nb2O6 ceramics were investigated in the temperature range from 323K to 1073K. A better electrical conductivity is obtained in the sample with larger ionic radius of doping element. Thus, the highest PF value is achieved in La-doped sample. The NbO2 second phase is counterproductive to reduce the lattice thermal conductivity, so La-doped sample...
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