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http://hdl.handle.net/10553/133381
Título: | Fine-grained BCZT piezoelectric ceramics by combining high-energy mechanochemical synthesis and hot-press sintering | Autores/as: | Sayagués, M. J. Otero, A. Santiago-Andrades, L. Poyato, R. Monzón Verona, Mario Domingo Paz Hernández, Rubén Gotor, F. J. Moriche, R. |
Clasificación UNESCO: | 3313 Tecnología e ingeniería mecánicas | Palabras clave: | Bczt Dielectric Properties Lead-Free Piezoceramics Mechanosynthesis Piezoelectric Properties, et al. |
Fecha de publicación: | 2024 | Proyectos: | Nuevos Scaffolds Piezoeléctricos de Compuestos Nanoestructurados Para la Regeneración Ósea Mediante Fabricación Aditiva | Publicación seriada: | Journal of Alloys and Compounds | Resumen: | Different stoichiometries of lead-free BaZr0.2Ti0.8O3–Ba0.7Ca0.3TiO3 (BCZT) prepared by mechanosynthesis and sintered by either conventional sintering (CS) or hot pressing (HP) techniques were studied to establish the dependence of piezoelectric and dielectric properties on sintering parameters and microstructure. All synthesized stoichiometries showed a pseudocubic perovskite phase with homogeneously distributed A- and B-cations in the structure. The BCZT retained the pseudocubic symmetry after sintering and an average grain size <1.8 µm was obtained in all cases. HP sintering hindered the secondary phase segregation observed in the CS ceramics and increased the relative density. Piezoelectric coefficients (d33) ranging from 5.1 to 21 pC/N and from 10.0 to 88.0 pC/N were obtained for CS and HP ceramics, respectively, despite the pseudocubic symmetry and the fine grain size. The higher d33 values for the HP ceramics are a consequence of the higher density, better chemical homogeneity and lower sintering temperature and time required for the mechanosynthesized BCZT powders with high sintering activity. | URI: | http://hdl.handle.net/10553/133381 | ISSN: | 0925-8388 | DOI: | 10.1016/j.jallcom.2024.176453 | Fuente: | Journal of Alloys and Compounds [ISSN 0925-8388], v. 1007, (Diciembre 2024) |
Colección: | Artículos |
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