Author(s): , , , , , , , , , ,

Keywords: , , , , , ,

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. 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

DOI: 10.1016/j.jeurceramsoc.2015.11.024