Fabrication and evaluation of CA-doped SrTiO3 thermoelectric materials by molten salt method

Abstract

In this study, we focused on the molten salt method and attempted a simple synthesis of SrTi[Formula: see text]Co[Formula: see text]O3. It was clarified that SrTi[Formula: see text]Co[Formula: see text]O3 can be obtained under relatively mild conditions by using the molten salt. In all samples, the electrical conductivity increased with increasing temperature. Compared with the sample without the molten salt, the electric conductivity of the samples with the molten salt was greatly improved. The sample using the KCl-NaCl mixed salt showed the highest electrical conductivity of 83 S/cm at 973 K. The relative densities of all the samples using the molten salt were above 85%. It is considered that the improvement in the electrical conductivity is partly due to the increase in the relative density.