Work

Microscale 1‐3‐Type (Na,K)NbO 3 ‐Based Pb‐Free Piezocomposites for High‐Frequency Ultrasonic Transducer Applications

Year: 2011

Type: article

Abstract: Fine-grained Pb-free (Na(0.535)K(0.485))(0.95)Li(0.05)(Nb(0.8)Ta(0.2))O(3) (NKLNT) piezoceramics prepared by spark plasma sintering (SPS) technique was used to fabricate NKLNT/epoxy 1-3 composites with a modified dice-fill method. Because of its good machinability, SPSed NKLNT ceramic rods could be miniaturized to a lateral width of 50 µm. After lapping down to 56 µm in thickness, the composite was used to fabricate an ultrasonic transducer as the active piezoelectric element. This composite transducer showed a bandwidth at -6 dB nearly 90%at a center frequency of 29 MHz, demonstrating that this Pb-free composite thick film is very promising for the fabrication of high-frequency ultrasonic transducers in medical imaging applications.

Source: Journal of the American Ceramic Society

DOI: 10.1111/j.1551-2916.2011.04508.x

Authors: Zong‐Yang Shen, Jing‐Feng Li, Ruimin Chen, Qifa Zhou, K. Kirk Shung

Institutions: Jingdezhen Ceramic Institute, State Key Laboratory of New Ceramics and Fine Processing, Tsinghua University, American Ceramic Society, University of Southern California

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