Paper Title:
Functionally Graded Piezoelectric Ceramics for Ultrasonic Transducers
  Abstract

Functionally graded piezoelectric ceramics (FGM) plates are attractive due to their ability to broaden the frequency bandwidth of the ultrasonic transducers. A resistivity gradient La-doped Lead Zirconate Titanate/Al-doped Zinc Oxide (La-PZT/Al-ZnO) piezoelectric ceramics plate was developed using a powder metallurgical process. Grading of the piezoelectric modulus across the plate was experimentally confirmed by the electrical impedance analysis and its gradient distribution was characterized using the profile-technique. The distribution of Zn2+ ions in the PZT region was examined using EPMA, XRD and SEM/EDX, respectively. Analysis results show that the gradient distributions of structural and electrical properties inside the FGM plate are mainly caused by the diffusion and aggregation of Zn2+ ions in the PZT layer. The functionally graded piezoelectric ceramics plate presented here will be useful for broadening the frequency bandwidth of piezoelectric transducers.

  Info
Periodical
Key Engineering Materials (Volumes 336-338)
Edited by
Wei Pan and Jianghong Gong
Pages
2609-2612
DOI
10.4028/www.scientific.net/KEM.336-338.2609
Citation
D. R. Jin, Z. Y. Meng, W. B. Wu, B. Qin, "Functionally Graded Piezoelectric Ceramics for Ultrasonic Transducers", Key Engineering Materials, Vols. 336-338, pp. 2609-2612, 2007
Online since
April 2007
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Price
$32.00
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