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Title

From nanosized precursors to high performance ceramics: The case of Bi2Ca2Co1.7Ox

AuthorsMadre, M. A.; Rasekh, Sh.; Salvador, C.; Torres, M. A. ; Bosque, P.; Diez, J. C.; Sotelo, A.
KeywordsElectrical properties
Microstructure
Sintering
Electroceramics
Issue Date2017
PublisherElsevier
CitationMaterials Letters 191: 14-16 (2017)
AbstractBi2Ca2Co1.7Ox thermoelectric ceramics were prepared by four different synthesis routes: coprecipitation with ammonium carbonate or oxalic acid, attrition milling, and solid state (as reference). Microstructure showed that coprecipitation and attrition milling produced sintered materials with less porosity and smaller particle sizes than the solid state ones. Thermoelectric properties reflect the microstructure, leading to materials with lower electrical resistivity and higher Seebeck coefficient, when compared with the solid state ones. In spite of an increase in thermal conductivity in these samples due to their lower porosity, the maximum estimated Figure-of-Merit is higher than in sintered materials.
Descriptionet al.
Publisher version (URL)https://doi.org/10.1016/j.matlet.2017.01.031
URIhttp://hdl.handle.net/10261/148692
DOI10.1016/j.matlet.2017.01.031
Identifiersdoi: 10.1016/j.matlet.2017.01.031
e-issn: 1873-4979
issn: 0167-577X
Appears in Collections:(ICMA) Artículos
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