Thermoelectric properties of sol–gel derived lanthanum titanate ceramics

Abstract

In this work, the thermoelectric properties of lanthanum titanate ceramics with different La/Ti ratios were reported. Samples were prepared using a sol–gel method followed by a conventional sintering process. At 973 K, the electrical resistivity of La_2/3TiO_2.87 ceramic is ∼91 μΩ m, with a Seebeck coefficient of −192 μV K⁻¹ and the thermal conductivity is 2 W m⁻¹ K⁻¹. The ZT value of La_2/3TiO_2.87 is 0.18 at 973 K, demonstrating its potential for high temperature thermoelectric applications.