Category: Transient Plane Source
Author(s): A. Kovalevsky, A. Sotelo, B S. Rasekh, F. M. Costa, J. C. Diez, J. S. Amaral, M. A. Madre, M. A. Torres, M. C. Ferro, N. M. Ferreira, V. S. Amaral
Keywords: electronics, Microstructure, Phase sintering, Thermal Conductivity, Thermoelectric, Transient liquid, Transient plane source (TPS) method
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