Tailoring the microstructure by a proper electric current control in flash sintering: The case of barium titanate
Flash sintering is arousing growing interest because high-density ceramics can be obtained at lower temperatures and shorter dwell times than conventional sintering. However, not only temperature and dwell times should be controlled during flash sintering but also parameters such as the electric fie...
| Autores: | , , , , |
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| Tipo de recurso: | artículo |
| Fecha de publicación: | 2022 |
| País: | España |
| Institución: | Universitat Politècnica de Catalunya (UPC) |
| Repositorio: | UPCommons. Portal del coneixement obert de la UPC |
| Idioma: | inglés |
| OAI Identifier: | oai:upcommons.upc.edu:2117/372970 |
| Acceso en línea: | https://hdl.handle.net/2117/372970 https://dx.doi.org/10.1016/j.jeurceramsoc.2022.05.053 |
| Access Level: | acceso abierto |
| Palabra clave: | Ferroelectricity Electronics ceramics Flash sintering Barium titanate BaTiO3 Ferroelectric ceramics Field-assisted sintering Ferroelectricitat Ceràmiques electròniques Àrees temàtiques de la UPC::Física |
| Sumario: | Flash sintering is arousing growing interest because high-density ceramics can be obtained at lower temperatures and shorter dwell times than conventional sintering. However, not only temperature and dwell times should be controlled during flash sintering but also parameters such as the electric field and electric current should be considered. Controlling all the parameters during the processing allows comprehensive control of the microstructure and, consequently, functional properties can be improved. In this work, it is evidenced that an exhaustive control of the flash electric current is a crucial factor for tailoring the microstructure of BaTiO3 ceramics. The results reveal that the most suitable way to control the sintering process is by using non-linear current profiles because better densification and improved grain growth is achieved. Although the results focus on BaTiO3, this work offers a new pathway to tailor the microstructure of flash sintered ceramics, which may be extended to other materials. |
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