Improved thermoelectric performances in textured Bi1.6Pb0.4Ba2Co2Oy/Ag composites
BiPbBaCoO thermoelectric ceramics with small Ag additions (0, 1, 3, and 5 wt%) have been textured using the laser floating zone method. Microstructure has shown a slight decrease on the secondary phases content and a better grain alignment in Ag added samples. These microstructural features are refl...
| Autores: | , , , , , |
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| Tipo de recurso: | artículo |
| Estado: | Versión enviada para evaluación y publicación |
| Fecha de publicación: | 2016 |
| País: | España |
| Institución: | Consejo Superior de Investigaciones Científicas (CSIC) |
| Repositorio: | DIGITAL.CSIC. Repositorio Institucional del CSIC |
| OAI Identifier: | oai:digital.csic.es:10261/148407 |
| Acceso en línea: | http://hdl.handle.net/10261/148407 |
| Access Level: | acceso abierto |
| Palabra clave: | Microstructure Electrical properties Texturing Grain growth Ceramic composite |
| Sumario: | BiPbBaCoO thermoelectric ceramics with small Ag additions (0, 1, 3, and 5 wt%) have been textured using the laser floating zone method. Microstructure has shown a slight decrease on the secondary phases content and a better grain alignment in Ag added samples. These microstructural features are reflected in the thermoelectric properties, which have shown a significant decrease of electrical resistivity, when the Ag content is raised. In spite of a corresponding decrease of Seebeck coefficient, all the Ag-containing samples possess higher Power Factor values than the BiPbBaCoO ones. Moreover, the maximum Power Factor values (about 0.36 mW/K.m at 650 °C) have been measured in BiPbBaCoO+3 wt% Ag samples, which are the best results reported in this family of materials. |
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