Piezoelectric properties of 3-X periodic Pb(ZrxTi1-x)O3-polymer composites
Piezoelectric properties of 3-X periodic Pb(ZrxTi1-x)O3-polymer composites
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DOI：
10.1063/1.1513202
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发表时间：
2002-11-15
影响因子：
3.2
通讯作者：
Lewis, JA
中科院分区：
文献类型：
--
作者：
Smay, JE;Cesarano, J III;Lewis, JA
研究了锆钛酸铅（PZT）-聚合物复合材料的压电性能随组成和相连接性的变化。PZT骨架结构通过机器人沉积制造，在1275 degreesC下致密化，随后用环氧树脂渗透以产生所需的PZT-聚合物复合材料。这些3-X结构由嵌入聚合物基质中的PZT杆的三维晶格（3-3）、用PZT面板覆盖的PZT晶格/聚合物基质（3-2）或用PZT面板覆盖并被固体PZT环环绕的PZT晶格/聚合物基质（3-1）组成。PZT：聚合物比率通过改变每个复合结构中的晶格（杆）间距而系统地变化。在PZT棒之间的交叉点处沿极化方向沿着形成的PZT柱的浓度随着PZT体积分数的平方而变化。这些3-X复合材料显示出增强的流体静力学品质因数相对于单片PZT由于应力集中在PZT柱和它们的介电常数显着降低，与最高的值为3-2和3-1复合材料。我们的实验观察结果进行了比较，理论预测的基础上的等应变，单位细胞模型修改，以占部分支持的应力在刚性环氧树脂相。(C)2002年美国物理学会。
The piezoelectric properties of lead zirconate titanate (PZT)-polymer composites were studied as a function of composition and phase connectivity. PZT skeletal structures were fabricated by robotic deposition, densified at 1275 degreesC, and subsequently infiltrated with epoxy to produce the desired PZT-polymer composites. These 3-X structures consisted of a three-dimensional lattice of PZT rods (3-3) embedded in a polymer matrix, a PZT lattice/polymer matrix capped with PZT face plates (3-2), or PZT lattice/polymer matrix capped with PZT face plates and encircled by a solid PZT ring (3-1). The PZT:polymer ratio was varied systematically by changing the lattice (rod) spacing in each composite architecture. The concentration of PZT pillars, which formed along the poling direction at the intersections between PZT rods, varied as the PZT volume fraction squared. These 3-X composites displayed enhanced hydrostatic figures of merit relative to monolithic PZT due to stress concentration in the PZT pillars and their dramatically reduced dielectric constant, with the highest values found for the 3-2 and 3-1 composites. Our experimental observations were compared to theoretical predictions based on an isostrain, unit cell model modified to account for the partial support of stress in the stiff epoxy phase. (C) 2002 American Institute of Physics.