Resonance modes and losses in 1-3 piezocomposites for ultrasonic transducer applications

Xuecang Geng, Qiming Zhang

    Research output: Contribution to journalArticle

    27 Citations (Scopus)

    Abstract

    The article presents the results of a recent investigation on the ultrasonic performance of 1-3 piezocomposites. Using a guided wave approach, the electromechanical properties of the thickness resonance are modeled and the results are compared with the experimental data. The influence of various losses in a 1-3 composite on the dispersion curves and the quality factor for the thickness mode is examined. It is found that the reduction in the quality factor of a composite compared with piezoceramic is mainly due to the acoustic coupling between the two constituents. Even for a composite with the mechanical Q of the polymer higher than that of the ceramic, the mechanical Q of the composite is still lower than that of the ceramic except when the ceramic volume content is very low. Hence, in most of piezoceramic polymer composites, the mechanical Q of the ceramic phase plays a major role in determining the quality factor of a 1-3 composite transducer. For the lateral modes in a 1-3 composite, it is found experimentally that the frequencies of the two lowest lateral modes can be determined approximately by the shear wave velocity and the width of the polymer gap over a broad ceramic volume fraction range, suggesting that they correspond to the half-wave standing waves in the polymer gap.

    Original languageEnglish (US)
    Pages (from-to)1342-1350
    Number of pages9
    JournalJournal of Applied Physics
    Volume85
    Issue number3
    DOIs
    StatePublished - Jan 1 1999

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    transducers
    ultrasonics
    composite materials
    ceramics
    Q factors
    polymers
    acoustic coupling
    high polymers
    standing waves
    S waves
    curves

    All Science Journal Classification (ASJC) codes

    • Physics and Astronomy(all)

    Cite this

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    abstract = "The article presents the results of a recent investigation on the ultrasonic performance of 1-3 piezocomposites. Using a guided wave approach, the electromechanical properties of the thickness resonance are modeled and the results are compared with the experimental data. The influence of various losses in a 1-3 composite on the dispersion curves and the quality factor for the thickness mode is examined. It is found that the reduction in the quality factor of a composite compared with piezoceramic is mainly due to the acoustic coupling between the two constituents. Even for a composite with the mechanical Q of the polymer higher than that of the ceramic, the mechanical Q of the composite is still lower than that of the ceramic except when the ceramic volume content is very low. Hence, in most of piezoceramic polymer composites, the mechanical Q of the ceramic phase plays a major role in determining the quality factor of a 1-3 composite transducer. For the lateral modes in a 1-3 composite, it is found experimentally that the frequencies of the two lowest lateral modes can be determined approximately by the shear wave velocity and the width of the polymer gap over a broad ceramic volume fraction range, suggesting that they correspond to the half-wave standing waves in the polymer gap.",
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    Resonance modes and losses in 1-3 piezocomposites for ultrasonic transducer applications. / Geng, Xuecang; Zhang, Qiming.

    In: Journal of Applied Physics, Vol. 85, No. 3, 01.01.1999, p. 1342-1350.

    Research output: Contribution to journalArticle

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