Category: Transient Plane Source
Abstract: Research has been focused on the Co-based thermoelectric family since the discovery of thermoelectric properties in NaCo₂O₄ ceramics. The formation of strong grain boundaries has been achieved in several ceramic materials through the addition of metallic Ag, forming the liquid phase. In the case of Ca₃Co₄O₉ ceramic materials, it is essential to find a comparable additive. In this study, K₂CO₃ is analyzed as liquid phase promoter during the sintering process. Thermal conductivity measurements were performed at 25-140°C, using the Hot Disk TPS 2500 S. The total thermal conductivity of K₂CO₃-containing samples was found to be slightly higher than pure Ca₃CoO₄.
Reference: Journal of the European Ceramic Society (2016), 36(4): 1025-1032