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以Fe73.5Cu1Nb3Si13.5B9非晶粉体为磁性增强材料,以丁基橡胶为基体,利用模压成型制备了压磁复合薄膜,并测试了压磁性能。结果表明,频率较低时,复合薄膜具有优良的压磁特性;复合薄膜的阻抗随频率的升高,压应力的增大而减小;阻抗变化幅度随压应力的增大而增大,随频率的升高而减小。用电阻与电容串联模型对复合薄膜的压磁效应进行理论分析,得出了与实验结果相符的结论。
With Fe73.5Cu1Nb3Si13.5B9 amorphous powder as magnetic reinforcing material and butyl rubber as matrix, the pressure-magnetic composite film was prepared by compression molding, and the piezomagnetic properties were tested. The results show that the composite film has excellent piezomagnetic properties at low frequency. The impedance of the composite film decreases with increasing frequency and compressive stress. The magnitude of impedance variation increases with increasing compressive stress. With the increase of compressive stress, Frequency increases and decreases. The piezomagnetic effect of the composite film was theoretically analyzed by using the series model of resistance and capacitance, and the conclusion which is in good agreement with the experimental results was obtained.