Person:
Prado Gonjal, Jesús De La Paz

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First Name
Jesús De La Paz
Last Name
Prado Gonjal
URI
https://hdl.handle.net/20.500.14352/76087
Affiliation
Universidad Complutense de Madrid
Faculty / Institute
Ciencias Químicas
Department
Química Inorgánica
Area
Química Inorgánica
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    Microwave synthesis & sintering of Sm and Ca co-doped ceria ceramics
    (International journal of hydrogen energy, 2015) Prado Gonjal, Jesús De La Paz; Heuguet, Romain; Muñoz Gil, Daniel; Rivera Calzada, Alberto Carlos; Marinel, Sylvain; Morán, Emilio; Schmidt, Rainer
    In this work we report on the combined use of microwave (MW) heating sources for the powder synthesis and the ceramic sintering of Sm and Ca co-doped ceria Ce_(0.8)Sm_(0.18)Ca_(0.02)O_(1.9) polycrystalline materials for potential application as an electrolyte in intermediate temperature solid oxide fuel cells (IT-SOFCs).We investigate the crystal structure, ceramic microstructure and the oxygen ion conductivity in detail and compare the latter to conventionally sintered ceramics. MW sintering of ceramic pellets leads to only slightly increased resistivity as compared to conventional sintering, but offers massive energy and time savings for potential industrial production processes. Exceptionally high oxygen ion conductivity without any significant electronic contribution was found in MW synthesized and MW sintered pellets, where the total resistivity, composed of grain boundary and bulk contributions, was found to be in the range of 0.5-1 kΩ at 500 ºC. Sm-and Ca co-doped ceria may be well-suited for electrolyte materials in IT-SOFCs.