Processing and characterization of Sr doped BiFeO3 multiferroic materials by high energetic milling
[EN] Multiferroic ceramics based on BiFeO3 and Sr-doped BiFeO 3 have been processed by high energetic milling and later thermal treatments at reduced temperatures to synthesize the perovskite structure. Single phase materials are obtained at 800 °C, reducing the temperature needed to complete the re...
| Autores: | , , |
|---|---|
| Tipo de recurso: | artículo |
| Estado: | Versión aceptada para publicación |
| Fecha de publicación: | 2011 |
| País: | España |
| Institución: | Consejo Superior de Investigaciones Científicas (CSIC) |
| Repositorio: | DIGITAL.CSIC. Repositorio Institucional del CSIC |
| OAI Identifier: | oai:digital.csic.es:10261/345422 |
| Acceso en línea: | http://hdl.handle.net/10261/345422 |
| Access Level: | acceso abierto |
| Palabra clave: | Bismuth ferrite Multiferroic Mechanosynthesis |
| Sumario: | [EN] Multiferroic ceramics based on BiFeO3 and Sr-doped BiFeO 3 have been processed by high energetic milling and later thermal treatments at reduced temperatures to synthesize the perovskite structure. Single phase materials are obtained at 800 °C, reducing the temperature needed to complete the reaction in solid state method. Ceramics with densities higher than 94% were obtained at 1000 °C, and up to 98% at 1050 °C. All the ceramics were obtained in a single thermal treatment, where synthesis, grain growth and densification take place. The addition of Sr stabilizes the BiFeO3 perovskite structure, avoiding its decomposition. Ceramics with higher dielectric permittivity and conductivity than non-doped materials are obtained, due to the increase of the amount of oxygen vacancies. It is shown for the first time that the grain boundary conductivity is increased in BiFeO3 by doping with Sr. © 2011 Elsevier B.V. |
|---|