Mechanical and electromechanical properties of calcium-modified lead titanate/poly(vinylidene fluoride-trifluoroethylene) 0-3 composites

Steven P. Marra; Kaliat T. Ramesh; Andrew S. Douglas

doi:10.1117/12.316852

20 July 1998 Mechanical and electromechanical properties of calcium-modified lead titanate/poly(vinylidene fluoride-trifluoroethylene) 0-3 composites

Steven P. Marra, Kaliat T. Ramesh, Andrew S. Douglas

Author Affiliations +

Proceedings Volume 3324, Smart Structures and Materials 1998: Smart Materials Technologies; (1998) https://doi.org/10.1117/12.316852
Event: 5th Annual International Symposium on Smart Structures and Materials, 1998, San Diego, CA, United States

Abstract

Thin film composite sensors have been fabricated which incorporate piezoelectric ceramic particles in an polymer matrix. These composites are more compliant than pure piezoelectric ceramics and can be embedded in thick structures to monitor internal mechanical conditions, such as the evolution of damage. Composite films consisting of Ca-modified lead titanate particles in a poly(vinylidene fluoride-trifluororethylene) matrix are examined in this paper. The viscoelastic properties of these composites (with various volume fractions, up to 60% ceramic) have been measured over a range of frequencies (0.01 to 100 rad/sec). The complex h^*₃₁ piezoelectric coefficient has also been measured for these composites for various volume fractions and over a frequency range from 5 to 100 rad/sec. The magnitudes and phase angles of the piezoelectric coefficients are shown to be highly frequency dependent.

Citation Download Citation

Steven P. Marra, Kaliat T. Ramesh, and Andrew S. Douglas "Mechanical and electromechanical properties of calcium-modified lead titanate/poly(vinylidene fluoride-trifluoroethylene) 0-3 composites", Proc. SPIE 3324, Smart Structures and Materials 1998: Smart Materials Technologies, (20 July 1998); https://doi.org/10.1117/12.316852

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