氧化镁形貌对取向硅钢磁性能的影响

采用球状、短棒状和薄片状的三种氧化镁配制成涂液涂布于取向硅钢板,经高温退火形成硅酸镁底层。采用扫描电子显微镜(SEM)、硅钢铁损测试仪等手段,研究初始颗粒形貌为球状、短棒状和薄片状的三种硅钢涂布用氧化镁对硅酸镁底层和取向硅钢磁性能的影响。结果表明,球状氧化镁团聚程度低,活性大,涂敷性好,形成的硅酸镁底层致密均匀,附着性好,硅钢铁损低,磁感应强度高。

Effect of particle morphology of magnesia on the magnetic properties of grain-oriented silicon steel

Three kinds of magnesia (spherical, clubbed and lamellar) were used to form forsterite on the grain-oriented silicon steel after high temperature annealing. Effects of primary particles morphology of magnesia on the properties of the forsterite underlayer and grain-oriented silicon steel were investigated by SEM and iron loss tester. The morphologies of magnesia primary particles were spherical, clubbed and lamellar. Results show that the spherical magnesia has the lowest conglobation, the highest activity and the best coating performance, thus the forsterite with finer homogeneous and good binding to the steel substrate can be obtained. The silicon steel used spherical magnesia has the lowest iron loss and the highest magnetic induction intensity.