• Title/Summary/Keyword: 고상단결정법

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Characterization of the Material Properties of 0.68Pb ($Mg_{1}$3/$Nb_{2}$3/)$O_3$-0.32PbT$iO_3$ Single Crystals Grown by the Solid-State-Crystal-Growth Method (고상단결정법으로 성장시킨 0.68Pb ($Mg_{1}$3/$Nb_{2}$3/)$O_3$-0.32PbT$iO_3$ 압전단결정의 물성평가)

  • 이상한;노용래
    • The Journal of the Acoustical Society of Korea
    • /
    • v.23 no.2
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    • pp.103-108
    • /
    • 2004

  • In this paper, all the materials constants of the PMN-32%PT single crystals grown by the solid state crystal growth method were measured by the resonance method. PMN-PT crystals of tetragonal symmetry have six elastic constants, three piezoelectric constants and two dielectric constants for their independent material constants. These materials constants were extracted from six sets of crystal samples of each different geometry to have different vibration modes respectively. Measured results showed that the crystal has larger electromechanical coupling factor k/sub 33/ (∼86%) and piezoelectric constant d/sub 33/ (∼1200pC/N) than conventional piezoceramics. Validity of the measurement was confirmed through comparison of the results with the impedance spectrum from finite element analysis of the samples and the results measured with a commercial do meter.

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