High thermoelectric performances of Bi–AE–Co–O compounds directionally growth from the melt; [Altas prestaciones termoeléctricas en compuestos Bi-AE-Co-O crecidos direccionalmente desde el fundido]

Diez, J.C. (Universidad de Zaragoza) ; Rasekh, S. ; Madre, M.A. (Universidad de Zaragoza) ; Torres, M.A. (Universidad de Zaragoza) ; Sotelo, A.E. (Universidad de Zaragoza)

Resumen: Bi2AE2Co2Ox (AE = Ca, Sr, and Ba) thermoelectric compounds were grown from the melt by the laser floating zone technique. Microstructural analysis of as-grown samples has shown the formation of well-aligned thermoelectric grains together with a relative high amount of secondary phases. On the other hand, a short (24 h) thermal treatment (810 °C for Sr, 800 °C for Ca, and 750 °C for Ba) under air, raises of thermoelectric phase content through the recombination of the secondary ones. These microstructural modifications led to a large decrease of electrical resistivity, improving the power factor. These results have been compared with samples prepared by the conventional solid state method and with the best values reported in the literature. From these data, it is possible to deduce that the high thermoelectric characteristics obtained in these samples make them very attractive for practical applications.

Idioma: Inglés

DOI: 10.1016/j.bsecv.2017.10.003

Año: 2018

Publicado en: Boletin de la Sociedad Espanola de Ceramica y Vidrio 57, 1 (2018), 1-8
ISSN: 0366-3175

Factor impacto JCR: 1.633 (2018)

Categ. JCR: MATERIALS SCIENCE, CERAMICS rank: 10 / 28 = 0.357 (2018) - Q2 - T2

Factor impacto SCIMAGO: 0.377 - Ceramics and Composites (Q2) - Mechanics of Materials (Q2) - Industrial and Manufacturing Engineering (Q2)

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.)