Affiliation:
1. Chinese Academy of Sciences
2. Toyama Prefectural University
Abstract
Lead-based piezoelectric ceramics have excellent piezoelectric properties with the compositions near the rhombohedral-tetragonal morphotropic phase boundary (MPB)[1,2]. In these materials, the dielectric and piezoelectric properties show the maximal values at MPB. For lead-free piezoelectric ceramics, finding the MPB area is a promising way to improve their properties. In this paper, the (1-x-y)BaZrO3-x(K0.45Na0.5Li0.05)NbO3-yBi (Mg0.5Ti0.5)O3 lead-free piezoelectric ceramics were prepared by solid-state reaction method, and their piezoelectric properties and dielectric properties were investigated. With the increase of KNLN content, the crystal structure changed from rombohedral phase to tetragonal phase, thus existed a MPB[3,4] between rombohedral and tetragonal phase. At room temperature, the specimen with the composition at MPB (x=0.93, y=0.01) shows the optimal piezoelectric properties (d33=225pC/N and kp=45%), which indicates that this material is a potential lead-free piezoceramic.
Publisher
Trans Tech Publications, Ltd.
Subject
Mechanical Engineering,Mechanics of Materials,Condensed Matter Physics,General Materials Science
Reference20 articles.
1. A. J. Moulson and J. M. Herbert: Electroceramics – Materials, Properties, Applications (Chapman & Hall, London, 1990).
2. J. M. Herbert: Ferroelectric transducers and sensors (Gordon and Breach Science Publishers, New York., 1982).
3. G. Fan, W. Z. Lu, X. H. Wang and F. Liang: Appl. Phys. Lett. 91 (2007) 202908.
4. A. B. Kounga, S. T. Zhang, W. Jo, T. Granzow and J. Rodel: Appl. Phys. Lett. 92 (2008) 222902.
5. R. Wang, H. Bando, and M. Itoh: Appl. Phys. Lett. 95 (2009) 092905.
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