Thermoelectric Properties of Highly Textured Ca-Co-O Ceramics Fabricated by RTGG Method

Abstract

We fabricated highly <001>-textured Ca3Co4O9 ceramics (Lotgering's orientation degree∼100%) by the reactive templated grain growth (RTGG) method. It was found that in-plane electrical conductivity ∼1.55 X 104 S/m (1050 K) was much higher than those of out-of-plane and non-oriented samples. This suggests that the RTGG method provide the highly textured Ca3Co4O9 ceramics with enhanced thermoelectric properties.