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选用最大粒度为40μm的Fe73.5CulNb1.5Si13.5B9Mo1.5粉体和硅橡胶混合制备的磁性薄膜作为压磁层。同时用Fe73.5CulNb3Si13.5B9非晶薄膜作为压电层。测试频率范围从10 kHZ到1 MHz,并且压应力从0~0.14 MPa。比较了两组层合结构的微应力阻抗效应,其中包括:压磁/压电/压磁层合结构和压电/压磁/压电层合结构。结果证明两组层合结构都存在不同程度的磁电耦合效应。在压应力小于0.02MPa时,磁电耦合效应随压应力增大而增大,大于0.02 MPa时,磁电耦合效应达到极大值,同时它对微应力阻抗效应贡献不明显。因为两组层合结构具有各自不同的磁电耦合体系,压磁/压电/压磁层合结构以压磁效应影响阻抗为主而压电/压磁/压电层合结构以压电效应影响阻抗为主。
The magnetic film prepared by mixing Fe73.5CulNb1.5Si13.5B9Mo1.5 powder with the maximum particle size of 40μm and silicone rubber was selected as the piezomagnetic layer. At the same time with Fe73.5CulNb3Si13.5B9 amorphous film as a piezoelectric layer. Test frequencies ranged from 10 kHZ to 1 MHz and compressive stresses ranged from 0 to 0.14 MPa. The microstress impedance effects of two laminated structures are compared, including: piezomagnetic / piezoelectric / piezomagnetic laminated structure and piezoelectric / piezomagnetic / piezoelectric laminated structure. The results show that there are different degrees of magneto-electric coupling effect between the two laminated structures. When the compressive stress is less than 0.02MPa, the magneto-electric coupling effect increases with the increase of compressive stress. When the compressive stress is larger than 0.02MPa, the magneto-electric coupling effect reaches a maximum, and its contribution to the microstress impedance effect is not obvious. Because the two laminated structures have their own different magneto-electric coupling systems, the piezomagnetic / piezoelectric / piezomagnetic laminated structure mainly influences the impedance by the piezomagnetic effect while the piezoelectric / piezomagnetic / piezoelectric laminated structure uses the piezoelectric effect Impedance-based.