轻质磁性材料的制备及在磁流变液中的应用

The Preparation of Light Magnetic Materials and it's Application on Magnetorheological Fluids

研究了使用化学镀的方法在轻质载体上包覆具有磁性的镍、钴等物质。该材料具有密度低的优点 (有效密度为 2 3g/cm3)。对比于几种羰基镍粉制备的磁流变液的沉降稳定性 ,使用该轻质磁性材料制备的磁流变液不用加防沉剂 ,其稳定性类似于加入较多防沉剂的羰基镍粉磁流变液。其在磁场下表观粘度比零磁场下的粘度有几十倍的变化。因此 ,使用该轻质磁性材料有望解决磁流变液普遍存在的沉降问题 。

It is reported that preparation of magnetic material(nickel and cobalt) on the surface of light material. The density of the new material is low (Effective density of it is 23 g/cm 3). The sedimental stability of the new magnetorheological fluid made by light magnetic material is similar to that of the MR fluid made by carbonyl nickel powders containing lots of anti-sedimental agent. The apparent viscosity of new MR fluids under magnetic field is dozens of times as high as the inital viscosity. Therefore the problem of settling of solid particles under gravity can be effectively prevented by manufacturing magnetorheological fluids using the new material.