分形结构二维金属镍枝晶的制备与分析

以环形金属镍为阳极,石墨芯为阴极,利用点电极电沉积法制备了具有明显分形结构的二维金属镍枝晶;再以平行板金属镍为阳极,石墨板为阴极,用自行设计的试验设备,通过喷射电沉积法制备了准二维金属镍枝晶簇。采用计算机软件,求得点电极电沉积和平行板电极喷射电沉积所得沉积物的分形维数分别为1.556387和1.753856。两种电沉积方法都适用于金属枝晶的研究。点电极电沉积过程中,电流随时间的延长而逐渐增大;平行板电极喷射电沉积过程中,电压随时间的延长而逐渐降低。

Preparation and analysis of two-dimensional nickel dendrite with fractal structure

A two-dimensional nickel dendrite with evident fractal structure was prepared by electrodeposition with a graphite core as point cathode and a nickel ring as anode. A quasi-two-dimensional dendritic cluster was produced on graphite plate by jet electrodeposition using a self-designed apparatus with a parallel nickel plate as anode. The fractal dimension was calculated as 1.556 387 for the deposit prepared with a point electrode and 1.753 856 for that electrodeposited on a plane electrode by computer software. Both electrodeposition methods are applicable for the study of metallic dendrite. The current was gradually increased with extending time during electrodeposition with a point electrode, and the potential was gradually decreased with extending time during electrodeposition on a parallel plane electrode.