Effect of annealing on the thermoelectric properties of directionally grown Bi2Sr2Co.8Ox ceramics
The effect of annealing on directionally solidified Bi 2Sr 2Co 1.8O x ceramic rods has been studied for different times up to 1008 h. Microstructure has shown five different phases in the as-grown materials which have been reduced to two major ones after 1008 h thermal treatment, accompanied by an i...
| Autores: | , , , , , |
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| Tipo de recurso: | artículo |
| Fecha de publicación: | 2012 |
| País: | España |
| Institución: | Consejo Superior de Investigaciones Científicas (CSIC) |
| Repositorio: | DIGITAL.CSIC. Repositorio Institucional del CSIC |
| OAI Identifier: | oai:dnet:digitalcsic_::70c049ff226ac014d94216a9334c8e8e |
| Acceso en línea: | http://hdl.handle.net/10261/73478 |
| Access Level: | acceso abierto |
| Sumario: | The effect of annealing on directionally solidified Bi 2Sr 2Co 1.8O x ceramic rods has been studied for different times up to 1008 h. Microstructure has shown five different phases in the as-grown materials which have been reduced to two major ones after 1008 h thermal treatment, accompanied by an important grain growth. These microstructural changes are reflected on the mechanical properties which are higher than those measured in the as-grown materials in all cases. Moreover, they also produce an important decrease on the resistivity and increase of thermopower, leading to a raise on the power factor on thermally treated samples, about two times, compared to the as-grown samples. © 2012 Elsevier Ltd and Techna Group S.r.l. All rights reserved. |
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