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Abstract
The structure of a high-sensitivity 1–3-type composite is studied. The effect of the anisotropy of elastic moduli of the 0–3 matrix on piezoelectric sensitivity, hydrostatic piezoelectric coefficient and anisotropy of electromechanical coupling factors is analysed. Effective parameters are predicted and analysed for the 1–0–3 composite based on modified lead titanate ceramic. The large values of piezoelectric coefficients g*33 ≈ 400 mV.m/N and g* h ≈ 200 mV.m/N and the considerable anisotropy of electromechanical coupling factors (k*33/k*31 ≈ –15, k* t /k* p ≈ –9) of the studied composite are discussed.
Acknowledgments
The authors would like to thank Prof. Dr. R. Stevens (University of Bath, UK), Prof. Dr. A.E. Panich and Prof. Dr. I.A. Parinov (Southern Federal University, Russia), and Prof. Dr. P. Bisegna (University of Rome “Tor Vergata”, Italy) for their continued interest in the research problem.
Notes
At room temperature the modified PbTiO3 FC is characterised Citation[5] by elastic moduli cE 11 = 14.33, cE 12 = 3.220, cE 13 = 2.413, cE 33 = 13.16, and cE 44 = 5.587 (in 1010 Pa), piezoelectric coefficients e 31 = 0.4584, e 33 = 6.499 and e 15 = 5.923 (in C/m2), g 33 = 32.56 mV.m/N, and dielectric permittivities ϵξ 11/ϵ 0 = 210 and ϵξ 33/ϵ 0 = 140.