Thermoelectric doping effect in Ca3Co4-xNixO9 ceramics

Constantinescu, G. ; Rasekh, S. ; Torres, M.A. (Universidad de Zaragoza) ; Bosque, P. ; Madre, M.A. (Universidad de Zaragoza) ; Sotelo, A. (Universidad de Zaragoza) ; Diez, J.C. (Universidad de Zaragoza)

Resumen: Ca3Co4-xNixO9 (x=0.01, 0.03, and 0.05) polycrystalline thermoelectric ceramics have been prepared by the classical solid state method. As a result of the Ni addition an increase in porosity has been detected. Moreover, the presence of Ni has been related with the increase of Ca2Co3O6 secondary phase and the appearance of a new NiO-CoO solid solution. However, for the 0.01-Ni doped samples an improvement in the thermoelectric performances has been measured. This effect has been related with a decrease in the resistivity values and an increase in the Seebeck coefficient. The raise in the power factor for the 0.01-Ni doped samples, compared with the undoped ones, is between 10 and 25% at 50 and 800 °C respectively. Moreover, the maximum power at 800 °C, around 0.25 mW/K2.m, is significantly higher than the best results obtained in Ni doped samples reported previously in the literature.

Idioma: Inglés

DOI: 10.1016/j.bsecv.2015.02.004

Año: 2015

Publicado en: Boletin de la Sociedad Espanola de Ceramica y Vidrio 54, 1 (2015), 21-27
ISSN: 0366-3175

Factor impacto JCR: 0.28 (2015)

Categ. JCR: MATERIALS SCIENCE, CERAMICS rank: 26 / 27 = 0.963 (2015) - Q4 - T3

Factor impacto SCIMAGO: 0.173 - Industrial and Manufacturing Engineering (Q3) - Mechanics of Materials (Q4) - Ceramics and Composites (Q4)

Financiación: info:eu-repo/grantAgreement/ES/DGA/T12
Financiación: info:eu-repo/grantAgreement/ES/DGA/T87
Financiación: info:eu-repo/grantAgreement/ES/MINECO/MAT2013-46505-C3-1-R

Tipo y forma: Article (Published version)

Área (Departamento): Área Expresión Gráfica en Ing. (Dpto. Ingeniería Diseño Fabri.)
Área (Departamento): Área Cienc.Mater. Ingen.Metal. (Dpto. Ciencia Tecnol.Mater.Fl.)