Thermoelectric properties of La3+ and Ce3+ co-doped CaMnO3 prepared by tape casting. Issue 3 (March 2020)

• Record Type: Journal Article
• Authors: Kim, C.M.; Kim, D.H.; Hong, H.Y.; Park, K.
• Is Part Of: Journal of the European Ceramic Society. Volume 40:Issue 3(2020)
• Page Start: 735
• Page End: 741
• Publication Date: 2020-03
• Subjects: Sintering -- Electrical conductivity -- Microstructure -- Thermoelectric properties; Ceramic materials -- Periodicals; Composite materials -- Periodicals; Matériaux céramiques -- Périodiques; Composites -- Périodiques; Ceramic materials; Composite materials; Periodicals; Electronic journals; 666.05
• DOI: 10.1016/j.jeurceramsoc.2019.08.021
• Languages: English
• ISSNs: 0955-2219

Abstract

Abstract: The structural and thermoelectric transport properties of Ca0.9 La0.1– x Ce x MnO3– δ ( x = 0 – 0.1) prepared through tape casting process were investigated. The thermoelectric transport properties of CaMnO3 were optimized by the La 3+ and Ce 3+ co-doping and tape casting process. The Ce 3+ substitution substantially enhanced the dimensionless figure-of-merit ( ZT ) due to the increases in electrical conductivity and absolute Seebeck coefficient. Of the studied samples, Ca0.9 La0.025 Ce0.075 MnO3– δ had the maximum ZT (0.17) at 800 °C, and this value was 42% and 70% larger than those of singly doped Ca0.9 La0.1 MnO3– δ (0.12) and Ca0.9 Ce0.1 MnO3– δ (0.10), respectively. We demonstrate that both the La 3+ and Ce 3+ co-doping and tape casting process are highly promising approaches in enhancing the high-temperature thermoelectric transport properties of CaMnO3 .