From core-shell BaTiO sub(3)gO to nanostructured low dielectric loss ceramics by spark plasma sintering
We report a quite general way to design materials with tailored properties by combining thermolysis and fast sintering approaches. Submicrometric-sized BaTiO sub(3) particles have been directly coated in a continuous nanocrystalline MgO shell through a thermal decomposition process. The electron mic...
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| Veröffentlicht in: | Journal of materials chemistry. C, Materials for optical and electronic devices Materials for optical and electronic devices, 2013-12, Vol.2 (4), p.683-690 |
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| container_title | Journal of materials chemistry. C, Materials for optical and electronic devices |
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| creator | Berthelot, Romain Basly, Brice Buffiere, Sonia Majimel, Jerome Chevallier, Geoffroy Weibel, Alicia Veillere, Amelie Etienne, Laeetitia Chung, U-Chan Goglio, Graziella Maglione, Mario Estournes, Claude Mornet, Stephane Elissalde, Cathy |
| description | We report a quite general way to design materials with tailored properties by combining thermolysis and fast sintering approaches. Submicrometric-sized BaTiO sub(3) particles have been directly coated in a continuous nanocrystalline MgO shell through a thermal decomposition process. The electron microscopy study has evidenced a shell composed of randomly oriented MgO nanocrystallites. The final nanostructured composite, made of sub-micrometric MgO and BaTiO sub(3) grains uniformly distributed, is obtained in situduring the SPS process. Such a rearrangement can be explained by the initial core-shell architecture, the weak cohesion of the MgO nanocrystallites and their soft plastic behavior under SPS conditions. The composite effect leads to significant modifications in both the dielectric properties and Curie-Weiss parameters compared to uncoated BaTiO sub(3), especially a decrease and thermal stabilization of both the permittivity and the dielectric losses. We ascribe such changes to the stress generated during SPS through the extended interfaces between the two components. |
| doi_str_mv | 10.1039/c3tc31990c |
| format | Article |
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Submicrometric-sized BaTiO sub(3) particles have been directly coated in a continuous nanocrystalline MgO shell through a thermal decomposition process. The electron microscopy study has evidenced a shell composed of randomly oriented MgO nanocrystallites. The final nanostructured composite, made of sub-micrometric MgO and BaTiO sub(3) grains uniformly distributed, is obtained in situduring the SPS process. Such a rearrangement can be explained by the initial core-shell architecture, the weak cohesion of the MgO nanocrystallites and their soft plastic behavior under SPS conditions. The composite effect leads to significant modifications in both the dielectric properties and Curie-Weiss parameters compared to uncoated BaTiO sub(3), especially a decrease and thermal stabilization of both the permittivity and the dielectric losses. 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The composite effect leads to significant modifications in both the dielectric properties and Curie-Weiss parameters compared to uncoated BaTiO sub(3), especially a decrease and thermal stabilization of both the permittivity and the dielectric losses. 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The composite effect leads to significant modifications in both the dielectric properties and Curie-Weiss parameters compared to uncoated BaTiO sub(3), especially a decrease and thermal stabilization of both the permittivity and the dielectric losses. We ascribe such changes to the stress generated during SPS through the extended interfaces between the two components.</abstract><doi>10.1039/c3tc31990c</doi></addata></record> |
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| source | Royal Society Of Chemistry Journals 2008-; Alma/SFX Local Collection |
| subjects | Architecture Barium titanates Dielectric loss Magnesium oxide Nanocrystals Nanostructure Shells Spark plasma sintering |
| title | From core-shell BaTiO sub(3)gO to nanostructured low dielectric loss ceramics by spark plasma sintering |
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