19 April 2007 Single crystal piezoelectric composites for advanced NDT ultrasound
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In this paper, the design, fabrication and characterization of PMN-PT single crystal/epoxy composites are reported for NDT ultrasound transducers. Specifically, 1-3 PMN-PT/epoxy composites with center frequencies of 5 MHz - 40 MHz were designed and fabricated using either the dice-and-fill method or a photolithography based micromachining process. The measured electromechanical coefficients for composites with frequency of 5 MHz - 15 MHz were about 0.78-0.83, and the coupling coefficients for composites with frequencies of 25 MHz- 40 MHz were about 0.71-0.72. The dielectric loss remains low (< 0.05). These properties hold promise for advanced NDT ultrasound applications.
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Xiaoning Jiang, Xiaoning Jiang, Kevin Snook, Kevin Snook, Wesley S. Hackenberger, Wesley S. Hackenberger, Xuecang Geng, Xuecang Geng, "Single crystal piezoelectric composites for advanced NDT ultrasound", Proc. SPIE 6531, Nondestructive Characterization for Composite Materials, Aerospace Engineering, Civil Infrastructure, and Homeland Security 2007, 65310F (19 April 2007); doi: 10.1117/12.715150; https://doi.org/10.1117/12.715150

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