Characterizing unpoled piezoelectric ceramic film by Lamb-waves

• Published in: IEEE transactions on ultrasonics, ferroelectrics, and frequency control Vol. 46; no. 5; pp. 1094 - 1100
• Main Authors: Wang, Z., Cheeke, J.D.N.
• Format: Journal Article
• Language: English
• Published: New York, NY IEEE 01.09.1999; Institute of Electrical and Electronics Engineers
• Subjects: Acoustic measurements; Acoustical measurements and instrumentation; Acoustics; Aluminum; Applied sciences; Building materials. Ceramics. Glasses; Ceramic industries; Ceramics; Chemical industry and chemicals; Coatings; Computer simulation; Condensed matter: structure, mechanical and thermal properties; Cross-disciplinary physics: materials science; rheology; Cut-off; Density; Dielectric constant; Exact sciences and technology; Frequency; Fundamental areas of phenomenology (including applications); General studies; Inversions; Lead zirconate titanates; Materials science; Materials testing; Mathematical models; Mechanical and acoustical properties; Nondestructive testing: ultrasonic testing, photoacoustic testing; Physical properties of thin films, nonelectronic; Physics; Piezoelectric films; Platinum; Shear; Steel; Substrates; Surfaces and interfaces; thin films and whiskers (structure and nonelectronic properties); Technical ceramics; Thick films; Elastic constant; Acoustic measurement; Deformation modulus; Surface wave; Aluminium; Ceramic coating; Modeling; Piezoelectric ceramics; Wave dispersion; Lamb wave; Stainless steel; Porosity; Non destructive test; Electromechanical properties
• ISSN: 0885-3010; 1525-8955
• DOI: 10.1109/58.796115

Determination of the physical properties of unpoled ceramic films on metallic substrates is considered; the problem is important because these properties may be quite different than those in the bulk, which are caused by the effects of porosity. It is shown that the density and elastic constant C/sub 33/ can be determined by a modification of the previously used modal frequency spacing (MFS) method, involving cut-off frequencies for longitudinal and shear sagittal plane modes. This method has the advantage of great simplicity compared with the standard inversion approach. Numerical calculations show that good accuracy of the order of 2% can be obtained for density and for C/sub 33/ for simulations of PZT films on stainless steel, platinum, and aluminum plates.