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磁致伸缩/压电复合材料通过磁致伸缩和压电效应的乘积而可以获得大的磁电效应.用磁控溅射方法制备了TbDyFe/PZT层状复合材料,实验测试了TbDyFe/PZT两层及TbDyFe/PZT/TbDyFe三层复合材料的磁电电压系数随周期磁场频率的变化关系,并采用有限元数值计算方法对两种材料的磁电电压系数进行了计算.研究结果表明,实验测试曲线与数值计算结果符合很好,所制备的层状复合材料在共振频率处存在最大的磁电电压系数值,由于两层板与三层板的振动模式不同,三层复合板的共振频率远高于两层复合板的共振频率.在非共振频率下,三层复合板的磁电转换效应高于两层复合板.有限元计算结果还显示,磁电层状复合材料的磁电电压系数随磁致伸缩层厚度的增加而增大.
Magnetostrictive / piezoelectric composites can obtain large magneto-electric effect by the product of magnetostriction and piezoelectric effect.The TbDyFe / PZT layered composites were prepared by magnetron sputtering method, and two TbDyFe / PZT Layer and TbDyFe / PZT / TbDyFe three-layer composite material with the frequency of the magnetic field changes in the relationship between the frequency and the use of finite element method to calculate the two materials magneto-electric voltage coefficient.The results show that the experimental test The curves and numerical results agree well with each other. The maximum value of magnetoelectric voltage coefficient exists at the resonant frequency of the prepared layered composites. Since the vibration modes of the two layers and the three layers are different, the resonant frequency of the three-layer composite is far Which is higher than the resonance frequency of the two-layer composite panel.The magnetoelectric conversion effect of the three-layer composite panel is higher than that of the two-layer composite panel under the non-resonant frequency.Finally, the calculation results show that the magnetoelectric voltage coefficient With the increase of magnetostrictive layer thickness.