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Appl. Sci. 2018, 8(1), 62; doi:10.3390/app8010062

Review and Perspectives of Aurivillius Structures as a Lead-Free Piezoelectric System

Instituto de Cerámica y Vidrio, CSS Group (Electroceramic Department), Consejo Superior de Investigaciones Científicas (CSIC), C/Kelsen, 5 28049 Madrid, Spain
Received: 2 October 2017 / Revised: 27 November 2017 / Accepted: 30 November 2017 / Published: 3 January 2018
(This article belongs to the Special Issue A Perspective on the Design of Lead-Free Piezoceramics)
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Abstract

According to the EU-Directives 2002/95/EC, 2002/96/EC, lead-based piezoceramics must be substituted in the future with more environmentally friendly alternatives, only when a reliable alternative is found. This is why an increasing interest has grown in the research community to find lead free piezoelectric materials that fulfil the requirements for this substitution. Different families of compounds have been shown to be possible candidates for this use, such as bismuth and niobates based perovskites, pyrochlores, etc. However, a material with piezoelectric coefficients similar to those of PZT (lead zirconate titanate, Pb[ZrxTi1-x]O3) has not been yet found. Besides, each of these families has its specific characteristics in terms of remnant polarization, coercive field or application temperature. Thus, the choice of each material should be made according to the specific needs of the application. In this sense, Aurivillius-type structure materials (also known as Bismuth Layered Structure Ferroelectrics, BLSF) can take advantage of their specific properties for uses as Lead Free Piezoelectric systems. Some of them have a high Curie temperature, which make them good candidates to be used as high temperature piezoelectrics; high coercive fields, which facilitates their use as actuators; or a high switching fatigue resistance, which can be useful for future applications as Ferroelectric Random Access Memories (FERAM). View Full-Text
Keywords: bismuth layered ferroelectric structures; aurivillius; piezoelectric; multiferroic bismuth layered ferroelectric structures; aurivillius; piezoelectric; multiferroic
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Moure, A. Review and Perspectives of Aurivillius Structures as a Lead-Free Piezoelectric System. Appl. Sci. 2018, 8, 62.

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