Modification of thermoelectric properties in Ca3Co4Oy ceramics by Nd doping

Ca3-xNdxCo4Oy polycrystalline thermoelectric ceramics with small amounts of Nd have been synthesized by the classical solid state method. X-ray diffraction data have shown that all the Nd has been incorporated into the Ca3Co4O9 and Ca3Co2O6 phases and no Nd-containing secondary phases have been prod...

ver descrição completa

Detalhes bibliográficos
Autores: Constantinescu, G., Torres, M. A., Rasekh, Sh., Madre, M. A., Diez, J. C., Sotelo, Andres
Tipo de documento: artigo
Estado:Versión enviada para evaluación y publicación
Data de publicação:2014
País:España
Recursos:Consejo Superior de Investigaciones Científicas (CSIC)
Repositório:DIGITAL.CSIC. Repositorio Institucional del CSIC
OAI Identifier:oai:digital.csic.es:10261/119354
Acesso em linha:http://hdl.handle.net/10261/119354
Access Level:Acceso aberto
Descrição
Resumo:Ca3-xNdxCo4Oy polycrystalline thermoelectric ceramics with small amounts of Nd have been synthesized by the classical solid state method. X-ray diffraction data have shown that all the Nd has been incorporated into the Ca3Co4O9 and Ca3Co2O6 phases and no Nd-containing secondary phases have been produced. Apparent density measurements have revealed that all samples are very similar, with densities around 70 % of the theoretical one. Electrical resistivity decreases in all Nd-doped samples, compared with the pure one, while Seebeck coefficient remains constant for all samples. The improvement in resistivity leads to higher power factor values than the obtained for the undoped samples. © 2013 Springer Science+Business Media New York.