Preparation and Properties of Bi0.5Na0.5TiO3-Ba (Hf,Ti)TiO3 Lead-Free Piezoelectric Ceramics


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Lead-free piezoelectric ceramics based on bismuth sodium titanate (BNT) -barium hafnate titanate (BHT) were prepared by a two-step synthesis process. The final BNT-BHT ceramics sintered at 1180oC for 2 h in air showed a perovskite structure with high density. The morphotropic phase boundaries (MPB) were found in BNT based piezoelectric ceramics with 8~10 wt% BHT in composites. In the case of Bi0.5Na0.5TiO3-0.08BaHf0.05Ti0.95O3 ceramics, a maximum piezoelectric coefficient d33 of 122.6 pC/N was obtained. The remnant polarization (Pr) and coercive field (Ec) were measured and the relationship between ferroelectricity and the BHT fraction in the compounds was investigated. The BNT-BHT ceramics were expected to be a new and promising candidate for lead-free piezoelectric device applications.



Key Engineering Materials (Volumes 334-335)

Edited by:

J.K. Kim, D.Z. Wo, L.M. Zhou, H.T. Huang, K.T. Lau and M. Wang




H. Y. Tian et al., "Preparation and Properties of Bi0.5Na0.5TiO3-Ba (Hf,Ti)TiO3 Lead-Free Piezoelectric Ceramics", Key Engineering Materials, Vols. 334-335, pp. 957-960, 2007

Online since:

March 2007




[1] G.A. Smolensky, V.A. Isopov, A.I. Argranovskaya, N.N. Krainic: Sov. Phys., Solid State 2 (1961), p.2651.

[2] B. Jaffe, W. Cook, H. Jaffe: Piezoelectric Ceramics (Academic, London, 1971) pp.47-114.

[3] S.E. Park, S. Wada, L.E. Cross, and T.R. Shrout: J. Appl. Phys. 86 (1999), p.2746.

[4] Z. Yu, R.Y. Guo, and A.S. Bhalla: Appl. Phys. Lett. 77 (2000), p.1535.

[5] C. Ang, Z. Yu, Z. Jing, R.Y. Guo, A.S. Bhalla, L.E. Cross: Appl. Phys. Lett. 80 (2002), p.3424.

[6] H.Y. Tian, Y. Wang, J. Miao, H. L. W. Chan and C. L. Choy: In press in J. Alloy and Comp.

[7] S.A. Sheets, A.N. Soukhojak, N. Ohashi, Y.M. Chiang: J. Appl. Phys, 90 (2001), p.5287.

[8] Y.M. Li, W. Chen, J. Zhou, Q. Xu, X.Y. Gu,R.H. Liao: Physica B 365 (2005), p.76.

[9] X.X. Wang, S.W. Or, X.G. Tang, H.L.W. Chan, P.K. Choy, P.C.K. Liu, Solid State Communications 134 (2005), p.659.

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