Location

Williamsburg, VA

Start Date

1-1-1986 12:00 AM

Description

Lead zirconate titanate (PZT) ceramics are widely used as piezoelectric transducer materials for bulk (BAW) and surface (SAW) acoustic wave devices (1–4). In this article investigations were primarily carried out on hot-pressed ceramics. The SAW properties such as the velocity and the electromechanical coupling constant were measured using a noncontact laser-ultrasound technique. The laser beam for generation of ultrasound has a ring shape in order to produce a strong ultrasonic pulse without overheating the sample surface. This technique is convenient and applicable to both poled and unpoled PZT. A novel method for measuring the SAW anisotropy is also given. The variation of SAW due to changes of microstructure such as grain size obtained by different hot pressing conditions are illustrated.

Book Title

Review of Progress in Quantitative Nondestructive Evaluation

Volume

5A

Chapter

Chapter 3: Sensors and Signal Processing

Section

Sensors

Pages

625-634

DOI

10.1007/978-1-4615-7763-8_64

Language

en

File Format

application/pdf

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Jan 1st, 12:00 AM

Ultrasonic Characterization of Lead Zirconate Titanate Ceramics

Williamsburg, VA

Lead zirconate titanate (PZT) ceramics are widely used as piezoelectric transducer materials for bulk (BAW) and surface (SAW) acoustic wave devices (1–4). In this article investigations were primarily carried out on hot-pressed ceramics. The SAW properties such as the velocity and the electromechanical coupling constant were measured using a noncontact laser-ultrasound technique. The laser beam for generation of ultrasound has a ring shape in order to produce a strong ultrasonic pulse without overheating the sample surface. This technique is convenient and applicable to both poled and unpoled PZT. A novel method for measuring the SAW anisotropy is also given. The variation of SAW due to changes of microstructure such as grain size obtained by different hot pressing conditions are illustrated.