21 June 1999 Determination of elastic, piezoelectric, and dielectric properties of Pb(Zn1/3Nb2/3)O3-PbTiO3 single crystals
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We report a set of measured material properties of Pb(Zn1/3Nb2/3)O3-PbTiO3(PZN-PT) multi-domain single crystals. While deriving these properties, it was assumed that the rhombohedral PZN-PT crystals have 4 mm symmetry when it is poled along the [001] of the original cubic direction. Samples with three pair of faces oriented in [001], [010] and [100] were made for the resonance measurements and additional samples with the orientation of [001], [110] and [110] were made for the ultrasonic measurements. Complete sets of the material constants were obtained for PZT-4.5%PT and PZN- 8%PT. The coupling coefficient k33 is 94% for the PZN- 8%PT and 90% for the PZN-4.5%PT. A piezoelectric constant d33 of 2300pC/N was obtained for the PZN-8%PT sample. These values are very encouraging for designing broadband ultrasonic transducers. Based these measurement results, the directional dependence of phase velocities and electromechanical coupling coefficients were analyzed. The calculations indicate that the coupling coefficient k31 and k33 has a maximum in the [110] and [001], respectively, a result consistent with the direct measurements. Errors in these measurements were also analyzed.
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Jianhua Yin, Jianhua Yin, Bei Jiang, Bei Jiang, Wenwu Cao, Wenwu Cao, "Determination of elastic, piezoelectric, and dielectric properties of Pb(Zn1/3Nb2/3)O3-PbTiO3 single crystals", Proc. SPIE 3664, Medical Imaging 1999: Ultrasonic Transducer Engineering, (21 June 1999); doi: 10.1117/12.350681; https://doi.org/10.1117/12.350681

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