Smart materials for high power applications

Shujun Zhang; Hyeong Jae Lee; Thomas R. Shrout

doi:10.1117/12.2009275

17 April 2013 Smart materials for high power applications

Shujun Zhang, Hyeong Jae Lee, Thomas R. Shrout

Proceedings Volume 8695, Health Monitoring of Structural and Biological Systems 2013; 86951D (2013) https://doi.org/10.1117/12.2009275
Event: SPIE Smart Structures and Materials + Nondestructive Evaluation and Health Monitoring, 2013, San Diego, California, United States

Abstract

Various PZT/epoxy 1-3 composites were investigated for high power applications. “Hard” lead zirconate titanates (PZT4 and PZT8) were chosen for active piezoelectrics owing to their high mechanical quality factors, Q_ms, while the passive polymers were selected based on the desired properties for high power composites - low elastic loss, low elastic modulus and high thermal conductivity. The results demonstrated that the composites with high thermal conductivity polymers generally have degraded electromechanical properties with significantly decreased mechanical quality factors, whereas the composites filled with low loss and low moduli polymers were found to have higher Q_ms with higher electromechanical coupling factors k_t: Qm ~ 200 and k_t ~ 0.68 for PZT4 composites; Qm ~ 400 and k_t ~ 0.6 for PZT8 composites. The effects of high drive field on the behavior of 1-3 composites were further investigated by varying active and passive components. Improved high power characteristics of 1-3 piezoelectric composites were achieved by selection of optimized composite components, with enhanced electromechanical efficiency and thermal stability under high drive conditions.

Citation Download Citation

Shujun Zhang, Hyeong Jae Lee, and Thomas R. Shrout "Smart materials for high power applications", Proc. SPIE 8695, Health Monitoring of Structural and Biological Systems 2013, 86951D (17 April 2013); https://doi.org/10.1117/12.2009275

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