【摘要】 研究了外加磁场对滤纸上Zn分枝状电解沉积物生长形貌的影响.用金相显微镜和原子力显微镜观察Zn沉积物的显微结构.发现在非饱和浓度下生长的沉积物生长形貌受电解液浓度和滤纸纤维影响,外加磁场对其形貌的影响不明显.在饱和电解液浓度下获得的沉积物分枝分两层,并且贴近滤纸表面的薄层比其上面离滤纸较远的那一层生长快.在饱和浓度电解液情形下,0.40T外加磁场使得沉积物分枝发生明显的螺旋状偏转.在实验基础上结合相关理论,认为外加磁场通过霍尔效应影响滤纸上Zn分枝状电解沉积物形貌.更多还原

【Abstract】 The effect of an applied magnetic field on the growth patterns of Zn electrodeposits on filter paper was investigated using an optical microscope and an atom force microscope. It was found that the concentration of electrolyte and the fibre of filter paper influenced strongly the morphology of Zn electrodeposits obtained in unsaturated electrolyte. No evidence indicated that the magnetic field affected the morphology of electrodeposits obtained in unsaturated electrolyte. The branches of Zn electrodeposits obtained in saturated electrolyte grew in two layers, and the thin layer that adhered to the filter paper grew faster than the thick layer. In the case of saturated electrolyte, the 0.40T magnetic field made the branched electrodeposits grow into a spiral pattern. On the basis of these experimental results and the related theories, it was proposed that the magnetic field influenced the morphologies of the branched Zn electrodeposits grown on filter paper through the Hall effect.更多还原