ISSN 0862-5468 (Print), ISSN 1804-5847 (online) 

Ceramics-Silikáty 58, (2) 106 - 110 (2014)


TOWARDS HIGHLY EFFICIENT THERMOELECTRICS: Ca3Co4O9+δ . n CaZrO3 COMPOSITE
 
Jankovský Ondřej 1, Huber Štěpán 1,2, Sedmidubský David 1, Nádherný Ladislav 1, Hlásek Tomáš 1, Sofer Zdeněk 1
 
1 Institute of Chemical Technology Prague, Technicka 5, Prague, Czech Republic
2 Institute of Physics, ASCR, v.v.i., Cukrovarnicka 10, Prague, Czech Republic

Keywords: Misfit cobaltites, Thermoelectric materials, Composites
 

We successfully prepared Ca3Co4O9+δ . n CaZrO3 composites by a ceramic route. These composites were characterized by X-Ray diffraction, differential thermal analysis, thermogravimetric analysis and scanning electron microscopy. Moreover, transport properties (Seebeck coefficient, electrical resistivity and thermal conductivity) were measured and the thermoelectric figure of merit ZT was determined. Addition of CaZrO3 led to a suppression of thermal conductivity of the samples. A high thermal stability connected to the interesting thermoelectric properties made this material a potential candidate for the p type cell in the high-temperature thermoelectric batteries.


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