磁致伸缩/压电叠层复合材料磁-机-电耦合系数分析

分析和推导了磁致伸缩/压电叠层复合材料的机-电耦合系数、磁-机耦合系数及磁-电耦合系数与磁致伸缩层和压电层性能参数及几何参数之间的关系.进一步分析表明，叠层复合材料低频时的磁电电压系数正比于磁-电耦合系数，谐振时的磁电电压系数正比于磁-电耦合系数与机械品质因素的乘积；磁电电压系数还与复合结构的本征阻抗有关，本征阻抗越大磁电电压系数越大.通过性能差异较大的Terfenol-D和FeNi基弹性合金分别与压电材料PZT5-H和PZT8相互组合构成复合材料的比较分析，进一步阐明了磁电复合材料磁-电耦合系数和机械品关键词：磁电效应磁-机-电耦合系数磁致伸缩材料压电材料

Analysis of magneto-mechano-electronic coupling factors in magnetostrictive/piezoelectric laminated composite

The magneto-mechanical coupling factor, electromechanical coupling factor, and magnetoelectric （ME） coupling factor of magnetostrictive/piezoelectric laminated composite, which are related to the geometric dimensions and the performance parameter of the magnetostrictive and piezoelectric materials, are analysed and derived. It is also demonstrated that the ME voltage coefficient at low frequency is directly proportional to the ME coupling factor while the ME voltage coefficient at resonance is directly proportional to the product of the ME coupling factor and the effective mechanical quality factor of the composite. In addition, the ME voltage coefficient is related to the intrinsic impedance of the composite. Multiple composites of distinct magnetostrictive materials （Terfenol-D, FeNi-based-alloy） and piezoelectric materials （PZT5-H, PZT8） are further analysed to demonstrate the theoretical analysis. The Terfenol-D/PZT5-H and FeNi-based-alloy/PZT8 laminated composites are fabricated and investigated, and the analysis gives better explanations to the experimental results.