Improvement of Bi2Sr2Co2Oy thermoelectric performances by Na doping

Çetin Karakaya, G. ; Ozçelik, Bekir ; Nane, O. ; Sotelo, A. (Universidad de Zaragoza) ; Rasekh, Sh. ; Torres, M.A. (Universidad de Zaragoza) ; Madre, M.A. (Universidad de Zaragoza)

Resumen: Bi2Sr2-xNaxCo2Oy thermoelectric materials with x = 0, 0.025, 0.05, 0.075, 0.10, 0.125, and 0.15 have been prepared by the classical solid state reaction. Microstructure has shown an important grain growth when Na is added, leading to very high bulk densities confirmed through density measurements. These modifications have produced a drastic decrease of electrical resistivity without significant modification of Seebeck coefficient. As a consequence, Power Factor has been increased in all Na-doped samples, reaching the maximum value (0.21 mW/K2.m at 650 °C) for 0.075 Na samples, which is fairly close to the reported for single crystals.

Idioma: Inglés

Año: 2018

Publicado en: JOURNAL OF ELECTROCERAMICS 40, 1 (2018), 11-15
ISSN: 1385-3449

Factor impacto JCR: 1.966 (2018)

Categ. JCR: MATERIALS SCIENCE, CERAMICS rank: 8 / 28 = 0.286 (2018) - Q2 - T1

Factor impacto SCIMAGO: 0.511 - Electrical and Electronic Engineering (Q2) - Electronic, Optical and Magnetic Materials (Q2) - Mechanics of Materials (Q2) - Condensed Matter Physics (Q2) - Materials Chemistry (Q2) - Ceramics and Composites (Q2)

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

Tipo y forma: Article (PostPrint)

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