Work

Novel Lead Zirconate Titanate Composite Via Freezing Technology for High Frequency Transducer Applications

Year: 2011

Type: article

Abstract: Novel PZT-5A ceramic-polymer composite was prepared via freezing technology. This composite exhibited good dielectric and ferroelectric behaviors. At 1 kHz, the dielectric constant and the dielectric loss were 546 and 0.046, respectively, while the remnant polarization was 13.0 μC/cm(2) at room temperature. The electromechanical coupling coefficient (k(t)) of PZT-5A composite was measured to be 0.54, which is similar to that of PZT piezoelectric ceramic. The piezoelectric coefficient (d(33)) of PZT-5A composite was determined to be ~250 pC/N. Using this composite, a 58MHz single element transducer with the bandwidth of 70% at -6dB was built, and the insertion loss was tested to be -29dB around the central frequency.

Source: Journal of Advanced Dielectrics

DOI: 10.1142/s2010135x11000112

Authors: B. P. ZHU, Q. F. ZHOU, C. H. HU, K. K. SHUNG, E. P. GORZKOWSKI, M. J. PAN

Institutions: University of Southern California, United States Naval Research Laboratory

Language: English

Topic: Ferroelectric and Piezoelectric Materials

Subfield: Materials Chemistry

Field: Materials Science

Domain: Physical Sciences

Open Access status: green

Funder: National Institute of Biomedical Imaging and Bioengineering

Award: A Resource on Medical Ultrasonic Transducer Technology