应变电阻片法测定Fe_(bac)Cu_1Nb_3Si_(15.5)B_7/硅橡胶复合薄膜的磁致伸缩性能

Determination of Magntostrictive Properties of Fe_(bac)Cu_1Nb_3Si_(15.5)B_7/Silicon Rubber Composite Film by Strain Resistance Sheet Method

研究了不同Fe_(bac)Cu_1Nb_3Si_(15.5)B_7非晶粉体与硅橡胶质量比的复合薄膜的磁致伸缩性能,确定了粉体和硅橡胶的比例与复合薄膜的磁致伸缩效应的内在联系,并根据广义变分原理确定了这种复合薄膜的弹性模量、泊松比和内应力值的范围。结果表明:Fe_(bac)Cu_1Nb_3Si_(15.5)B_7非晶粉体与硅橡胶的质量比为3∶1时,复合薄膜的磁致伸缩系数存在极大值。该复合薄膜具有很好的柔性磁弹性能,是制备柔性力敏传感器的优良材料。

Magnetostriction of the composite film with different mass ratios of FebacCu1Nb3Si15.5B7amorphous powder to silicon rubber was studied. The internal relation between the ratio of powder to silicon rubber and the magnetostriction of the composite film was determined and the range of elastic modulus, Poisson＇s ratio and innerstress of the composite film were determined based on generalized variational principle. The results show that when the mass ratio of FebacCu1Nb3Si15.5B7 amorphous powder to silicon rubber is 3：1, the magnetostrictive coefficient of the composite film reaches the maximum value. The composite film has very good flexible magnetic elastic properties, and it is an excellent material for preparation of flexible force sensor.