Influence of sample size on ultrasonic phase velocity measurements in piezoelectric ceramics

Rui Zhang, Bei Jiang, Wenwu Cao

Research output: Contribution to journalArticlepeer-review

8 Scopus citations

Abstract

Phase velocities of ultrasound are used for characterizing elastic properties of solids. One of the basic requirements is that the sample area should be much larger than the size of the transducer so that plane wave approximation will hold. This geometric requirement may not be possible to realize for some materials that can only be made in very small size. Using poled and unpoled lead zirconate titanate (PZT-5H) ceramics as examples, we have analyzed experimentally the sample size influence to the ultrasonic measurements. The smallest dimension that is in contact with the transducer is only 14% of the diameter of the transducer. We found that the phase velocity increases when the contact area becomes smaller. The velocity increase is 1.4% and 0.9%, respectively, in the unpoled and poled PZT-5H for the smallest dimension sample compared to bulk values.

Original languageEnglish (US)
Pages (from-to)10194-10198
Number of pages5
JournalJournal of Applied Physics
Volume91
Issue number12
DOIs
StatePublished - Jun 15 2002

All Science Journal Classification (ASJC) codes

  • Physics and Astronomy(all)

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