Step-wise current reactive flash sintering of Ba0.85Ca0.15Ti0.90Zr0.10O3 (BCZT) ceramics: structure and electrical properties
This study presents the first demonstration of the preparation of the lead-free piezoelectric ceramic Ba0.85Ca0.15Ti0.90Zr0.10O3 (BCZT) by reactive flash sintering (RFS). It is shown that by using step-wise current controlled ramps, it is possible to obtain homogeneous and phase-pure specimens at re...
| Autores: | , , , , , , , , , |
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| Tipo de recurso: | artículo |
| Fecha de publicación: | 2025 |
| 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:2117/445755 |
| Acceso en línea: | https://hdl.handle.net/2117/445755 https://dx.doi.org/10.1016/j.jeurceramsoc.2025.117845 |
| Access Level: | acceso embargado |
| Palabra clave: | Ceramics Controlled ramps Tunable atmospheres Piezoelectric Àrees temàtiques de la UPC::Enginyeria dels materials::Assaig de materials |
| Sumario: | This study presents the first demonstration of the preparation of the lead-free piezoelectric ceramic Ba0.85Ca0.15Ti0.90Zr0.10O3 (BCZT) by reactive flash sintering (RFS). It is shown that by using step-wise current controlled ramps, it is possible to obtain homogeneous and phase-pure specimens at reduced furnace temperature (1100ºC) in 10¿min. Thus, RFS allows synthesis and sintering to be performed in a single step, resulting in significant energy and time savings compared to conventional processes such as solid-state reaction, which typically require multiple stages such as calcination followed by sintering for long periods of time at temperatures typically higher than 1300ºC. The effect of the synthetic atmosphere on the final structural, microstructural, ferroelectric and piezoelectric properties of the obtained ceramics is evaluated by the simultaneous use of several characterization techniques. It is shown that structurally and microstructurally the tunable atmosphere has no noticeable effect, whereas significant differences were found in terms of ferroelectric and piezoelectric properties. |
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