Processing and characterization of Sr doped BiFeO3 multiferroic materials by high energetic milling
| Autor: | Carlos Moure, A. Moure, Jesus Tartaj |
|---|---|
| Rok vydání: | 2011 |
| Předmět: |
Permittivity
Materials science Mechanical Engineering Metals and Alloys Mineralogy Thermal treatment Conductivity Grain growth chemistry.chemical_compound Chemical engineering chemistry Mechanics of Materials visual_art Materials Chemistry visual_art.visual_art_medium Grain boundary Multiferroics Ceramic Bismuth ferrite |
| Zdroj: | Journal of Alloys and Compounds. 509:7042-7046 |
| ISSN: | 0925-8388 |
| DOI: | 10.1016/j.jallcom.2011.03.132 |
| Popis: | Multiferroic ceramics based on BiFeO 3 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 BiFeO 3 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 BiFeO 3 by doping with Sr. |
| Databáze: | OpenAIRE |
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