TY - JOUR
T1 - Design of low-loss 1-3 piezoelectric composites for high-power transducer applications
AU - Lee, Hyeong Jae
AU - Zhang, Shujun
N1 - Funding Information:
manuscript received January 10, 2012; accepted may 6, 2012. This work was supported by the office of naval research and the national Institutes of Health under grant number p41-rr11795. The authors are with the materials research Institute, The pennsylvania state University, University park, pa (e-mail: [email protected]). doI http://dx.doi.org/10.1109/TUFFc.2012.2415
PY - 2012
Y1 - 2012
N2 - Lead zirconate titanate (PZT)/polymer 1-3 composites have improved electromechanical properties compared with monolithic counterparts, but possess a low mechanical quality factor, limiting their use in high-power transducer applications. The goal of this work was to improve the mechanical quality factor of 1-3 PZT/polymer composites by optimizing the polymer materials. Theoretical analysis and modeling were performed for optimum composite design and various polymers were prepared and characterized. 1-3 piezocomposites were constructed and their electromechanical properties were experimentally determined. 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 mechanical quality factors with higher electromechanical coupling factors: Q m ∼ 200 and k t ∼ 0.68 for PZT4 composites; Q m ∼ 400 and k t ∼ 0.6 for PZT8 composites. The improved mechanical quality factor of 1-3 piezocomposites may offer improved performance and thermal stability of transducers under high-drive operation.
AB - Lead zirconate titanate (PZT)/polymer 1-3 composites have improved electromechanical properties compared with monolithic counterparts, but possess a low mechanical quality factor, limiting their use in high-power transducer applications. The goal of this work was to improve the mechanical quality factor of 1-3 PZT/polymer composites by optimizing the polymer materials. Theoretical analysis and modeling were performed for optimum composite design and various polymers were prepared and characterized. 1-3 piezocomposites were constructed and their electromechanical properties were experimentally determined. 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 mechanical quality factors with higher electromechanical coupling factors: Q m ∼ 200 and k t ∼ 0.68 for PZT4 composites; Q m ∼ 400 and k t ∼ 0.6 for PZT8 composites. The improved mechanical quality factor of 1-3 piezocomposites may offer improved performance and thermal stability of transducers under high-drive operation.
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U2 - 10.1109/TUFFC.2012.2415
DO - 10.1109/TUFFC.2012.2415
M3 - Article
AN - SCOPUS:84866636296
SN - 0885-3010
VL - 59
SP - 1969
EP - 1975
JO - IEEE Transactions on Ultrasonics, Ferroelectrics, and Frequency Control
JF - IEEE Transactions on Ultrasonics, Ferroelectrics, and Frequency Control
IS - 9
M1 - 6306017
ER -