MAGNETOELECTRIC EFFECT IN PIEZOELECTRIC MAGNETOSTRICTIVE MULTILAYER (2-2) COMPOSITES
MAGNETOELECTRIC EFFECT IN PIEZOELECTRIC MAGNETOSTRICTIVE MULTILAYER (2-2) COMPOSITES
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DOI：
10.1177/1045389x9400500406
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发表时间：
1994-07-01
影响因子：
2.7
通讯作者：
HARSHE, G
中科院分区：
文献类型：
--
作者：
AVELLANEDA, M;HARSHE, G
我们考虑的磁电效应所产生的多层复合材料的压电陶瓷和磁致伸缩材料的粘结层在线性制度。磁电耦合产生于层之间的机械接触以及每个相中的电/机械和磁/机械耦合。计算的磁电系数α *，以及优值k（me）和k（me，cl）。这些计算充分考虑了材料性质中的电、磁和机械失配，以及两种材料的体积分数。我们推导出最佳的体积分数f1 crit的压电材料需要最大限度地提高品质因数k（fme）或k（me，cl）的复合材料，并给出标准优化的磁电效应的选择的各个组成部分。我们计算了各种压电/磁致伸缩组合的品质因数。CoFe_2 O_4/PZT_5 H（k（me）= 14%）、Terfenol D/PZT_5A（k（me）= 22%）和Terfenol D/PZT_4（k（me）= 30%）的组合显示出可用作磁电换能器的合理的能量转移。
We consider the magnetoelectric effect arising in a multilayer composite consisting of bonded layers of a piezoelectric ceramic and a magnetostrictive material operating in the linear regime. Magnetoelectric coupling arises from the mechanical contacts between layers and the electric/mechanical and magnetic/mechanical coupling in each phase. Calculations of the magnetoelectric coefficient alpha* as well as of the figures of merit k(me) and k(me, cl) are presented. These calculations fully take into account the electric, magnetic and mechanical mismatch in the material properties, as well as the volume-fractions of both materials. We derive the optimal volume fraction f1crit of piezoelectric material needed to maximize the figure of merit k(fme) or k(me, cl) for the composite and give criteria for optimizing the magnetoelectric effect in terms of the choice of the individual constituents. We computed the figures of merit of a variety of piezoelectric/magnetostrictive combinations. The combinations CoFe2O4/PZT5H (k(me) = 14%), Terfenol D/PZT5A (k(me) = 22%) and Terfenol D/PZT4 (k(me) = 30%) show reasonable energy transfer to be useful as magnetoelectric transducers.