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

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Vivar-Ocampo, Rodrigo and Pardo, Lorena and Ávila Brande, David and Morán, Emilio and González, Amador and Bucio, Lauro and Villafuerte-Castrejón, María-Elena (2017) 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. Materials, 10 (7). p. 736. ISSN 1996-1944

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Official URL: https://doi.org/10.3390/ma10070736




Abstract

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 Bi0.50Na0.50TiO3 (BNT) based solid solutions. The pseudo-binary (1 − x)Bi0.50Na0.50TiO3–xBa1 − yCayTiO3 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.


Item Type:Article
Uncontrolled Keywords:Bismuth sodium titanate; Barium titanate; solid state synthesis; Pechini synthesis route; Morphotropic Phase Boundary; lead-free; piezoelectricity; ceramics
Subjects:Sciences > Chemistry > Chemistry, Inorganic
ID Code:66533
Deposited On:05 Jul 2021 14:52
Last Modified:06 Jul 2021 11:06

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