Single crystal piezoelectric composites for advanced NDT ultrasound

Xiaoning Jiang, Kevin Snook, Wesley S. Hackenberger, Xuecang Geng, H. Felix Wu, Aaron A. Diaz, Peter J. Shull
2007 Nondestructive Characterization for Composite Materials, Aerospace Engineering, Civil Infrastructure, and Homeland Security 2007  
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
more » ... efficients 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. Downloaded From: http://proceedings.spiedigitallibrary.org/ on 10/10/2014 Terms of Use: http://spiedl.org/terms Proc. of SPIE Vol. 6531 65310F-2 Downloaded From: http://proceedings.spiedigitallibrary.org/ on 10/10/2014 Terms of Use: http://spiedl.org/terms Proc. of SPIE Vol. 6531 65310F-7 Downloaded From: http://proceedings.spiedigitallibrary.org/ on 10/10/2014 Terms of Use: http://spiedl.org/terms
doi:10.1117/12.715150 fatcat:wndql6inaraybbqjmmgwvlozsq