Improved ultrasonic spectroscopy methods for characterization of dispersive materials

• Published in: IEEE transactions on ultrasonics, ferroelectrics, and frequency control Vol. 48; no. 4; pp. 1060 - 1065
• Main Authors: Wang, H, Cao, W
• Format: Journal Article
• Language: English
• Published: New York, NY IEEE 01.07.2001; Institute of Electrical and Electronics Engineers; The Institute of Electrical and Electronics Engineers, Inc. (IEEE)
• Subjects: Acoustical measurements and instrumentation; Acoustics; Attenuation; Attenuation measurement; Biomedical Engineering; Ceramics; Dispersion; Dispersions; Errors; Exact sciences and technology; Ferroelectric materials; Frequency measurement; Fundamental areas of phenomenology (including applications); High frequencies; Models, Theoretical; Phase measurement; Phase velocity; Physics; Piezoelectric ceramics; Piezoelectric materials; Spectroscopy; Spectrum Analysis - methods; Titanium compounds; Transducers; Ultrasonic spectroscopy; Ultrasonic transducers; Ultrasonic variables measurement; Ultrasonics; Velocity measurement; Acoustic spectrometry; Acoustic measurement; Ultrasonic control; Wave damping; Material testing; PZT; Experimental study; High frequency; Modeling; Piezoelectric ceramics; Wave dispersion
• ISSN: 0885-3010; 1525-8955
• DOI: 10.1109/58.935723

Transmission ultrasonic spectroscopy method has been successfully implemented for the characterization of piezoceramics at high frequencies. There are, however, still some intrinsic error sources that limit the accuracy of the method. In this paper, two improved ultrasonic spectroscopy methods are presented, which can reduce the number of pre-required parameters and reduce another error source. The two improved methods were used to measure the frequency dispersion of phase velocity and attenuation of doped piezoceramic lead zirconate titanate (PZT-5A); results were compared with those obtained from the conventional method. The advantages and limitations of each method are discussed.