Hydrostatic Pressure Dependence of Dielectric, Elastic, and Piezoelectric Properties of Pb(Mg1/3Nb2/3)O3–0.33PbTiO3 Ceramic
Hydrostatic Pressure Dependence of Dielectric, Elastic, and Piezoelectric Properties of Pb(Mg1/3Nb2/3)O3–0.33PbTiO3 Ceramic
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DOI：
10.1111/j.1551-2916.2011.04455.x
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发表时间：
2011-09
影响因子：
3.9
通讯作者：
Junjie Gao;Zhuo Xu;Chonghui Zhang;Fei Li;Xiaoyong Wei;X. Yao
中科院分区：
文献类型：
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作者：
Junjie Gao;Zhuo Xu;Chonghui Zhang;Fei Li;Xiaoyong Wei;X. Yao
静水压力对压电材料的影响是水下装置设计的关键因素。本文研究了Pb（Mg 1/3 Nb 2/3）O3-0.33PbTiO3 [PMNT（67/33）]陶瓷在0.1 ~ 455 MPa压力范围内的介电、弹性和压电性能。在静水压下，由于畴壁运动增强，介电常数和损耗增加。随着静水压的增加，机械损耗急剧增加，这是由于畴壁运动和传压流体与压电振子之间摩擦力的增加。此外，压电系数（d33，d31）和机电耦合系数（k33，k31）随着压力的增加而减小，这是由于压力引起的PMNT陶瓷的去极化。
The effect of hydrostatic pressure on piezoelectric materials is a crucial factor for underwater device design. In this work, the dielectric, elastic, and piezoelectric properties of Pb(Mg1/3Nb2/3)O3–0.33PbTiO3 [PMNT (67/33)] ceramics were investigated under pressure from 0.1 to 455 MPa. The dielectric permittivity and losses were found to increase under hydrostatic pressure due to enhanced domain wall motion. With increasing hydrostatic pressure, the mechanical losses drastically increased, which can be attributed to the increase of both domain wall motion and the friction between pressure-transmitting fluid and piezoelectric vibrators. In addition, piezoelectric coefficients (d33, d31) and electromechanical coupling factors (k33, k31) were found to decrease with increasing pressure, owing to the pressure-induced depolarization for PMNT ceramics.