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利用化学气相沉积法制备四针状氧化锌(T-ZnO),将T-ZnO粉末转移到涂覆有银浆的ITO衬底上,再将TZnO阴极进行快速化学镀镍,得到了T-ZnO/Ni阴极.运用扫描电子显微镜与透射电子显微镜对T-ZnO粉末、T-ZnO阴极、T-ZnO/Ni阴极的表面形貌进行表征;运用X射线能谱仪与X射线衍射仪分别对T-ZnO/Ni阴极的成分与结构进行测试.结果表明,T-ZnO阴极经过化学镀镍后在阴极表面沉积无序的微晶态金属Ni.场发射测试表明,镍包覆T-ZnO阴极可降低开启场强(1.60 V/μm),提高场增强因子(7 190).
Four-needle-shaped zinc oxide (T-ZnO) was prepared by chemical vapor deposition. The T-ZnO powder was transferred onto an ITO substrate coated with silver paste. The TZnO cathode was rapidly electroless-plated with nickel to obtain T-ZnO / Ni cathode.The morphology of T-ZnO cathode, T-ZnO cathode and T-ZnO / Ni cathode were characterized by scanning electron microscopy and transmission electron microscopy. The surface morphology of T-ZnO cathode and T-ZnO / Ni cathode were characterized by X-ray diffraction -ZnO / Ni cathode.The results show that the T-ZnO cathode deposited by electroless nickel plating on the cathode surface of the disordered microcrystalline metal Ni field emission test showed that the nickel-coated T-ZnO cathode can be Reduce the opening field strength (1.60 V / μm) and increase the field enhancement factor (7 190).