Electromechanical properties of lead zirconate titanate piezoceramics under the influence of mechanical stresses

Qiming Zhang, Jianzhong Zhao

    Research output: Contribution to journalArticlepeer-review

    141 Scopus citations

    Abstract

    In lead zirconate titanate piezoceramics, external stresses can cause substantial changes in the piezoelectric coefficients, dielectric constant, and elastic compliance due to nonlinear effects and stress depoling effects. In both soft and hard PZT piezoceramics, the aging can produce a memory effect that will facilitate the recovery of the poled state in the ceramics from momentary electric or stress depoling. In hard PZT ceramics, the local defect fields built up during the aging process can stabilize the ceramic against external stress depoling that results in a marked increase in the piezoelectric coefficient and electromechanical coupling factor in the ceramic under the stress. Although soft PZT ceramics can be easily stress depoled (losing piezoelectricity), a DC bias electric field, parallel to the original poling direction, can be employed to maintain the ceramic poling state so that the ceramic can be used to high stresses without depoling.

    Original languageEnglish (US)
    Pages (from-to)1518-1526
    Number of pages9
    JournalIEEE transactions on ultrasonics, ferroelectrics, and frequency control
    Volume46
    Issue number6
    DOIs
    StatePublished - Dec 1 1999

    All Science Journal Classification (ASJC) codes

    • Instrumentation
    • Acoustics and Ultrasonics
    • Electrical and Electronic Engineering

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