Piezoelectric ceramics of the (1 - x)Bi0.50Na0.50TiO3-xBa0.90Ca0.10TiO3 lead-free solid solution: Chemical shift of the morphotropic phase boundary, a case study for x = 0.06
Research and development of lead-free piezoelectric materials are still the hottest topics in the field of piezoelectricity. One of the most promising lead-free family of compounds to replace lead zirconate-titanate for actuators is that of BiNaTiO (BNT) based solid solutions. The pseudo-binary (1 -...
| Autores: | , , , , , , |
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| Tipo de recurso: | artículo |
| Estado: | Versión publicada |
| Fecha de publicación: | 2017 |
| País: | España |
| Institución: | Consejo Superior de Investigaciones Científicas (CSIC) |
| Repositorio: | DIGITAL.CSIC. Repositorio Institucional del CSIC |
| OAI Identifier: | oai:digital.csic.es:10261/188801 |
| Acceso en línea: | http://hdl.handle.net/10261/188801 |
| Access Level: | acceso abierto |
| Palabra clave: | Bismuth sodium titanate Morphotropic phase boundary Ceramics Piezoelectricity Lead-free Barium titanate Solid state synthesis Pechini synthesis route |
| Sumario: | Research and development of lead-free piezoelectric materials are still the hottest topics in the field of piezoelectricity. One of the most promising lead-free family of compounds to replace lead zirconate-titanate for actuators is that of BiNaTiO (BNT) based solid solutions. The pseudo-binary (1 - x)BiBiNaTiO-xBaCaTiO system has been proposed for high temperature capacitors and not yet fully explored as piezoelectric material. In this work, the solid solution with x = 0.06 and y = 0.10 was obtained by two different synthesis routes: solid state and Pechini, aiming at using reduced temperatures, both in synthesis (<800 °C) and sintering ( < 1150 °C), while maintaining appropriated piezoelectric performance. Crystal structure, ceramic grain size, and morphology depend on the synthesis route and were analyzed by X-ray diffraction, together with scanning and transmission electron microscopy. The effects of processing and ceramic microstructure on the structural, dielectric, ferroelectric, and piezoelectric properties were discussed in terms of a shift of the Morphotropic Phase Boundary, chemically induced by the synthesis route. |
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