T-ZnO晶须化学镀铜复合粉体的制备及其电磁性能的研究

Preparation and Electromagnetic Performance of Cu/T-ZnO Whiskers Composite Powders by Electroless Copper Plating

采用化学镀的方法制备了Cu包覆四脚状氧化锌晶须(T-ZnO晶须)的复合粉体.使用X射线衍射分析仪(XRD)进行了物象分析,扫描电镜(SEM)观察了粉体的形貌.运用能谱仪(EDS)进行了成份分析.结果表明,晶须为纯氧化锌,晶体结构为六方晶系纤锌矿结构,镀层为纯铜.SEM观察晶须外观形貌为四脚状结构.同时使用波导法对T-ZnO晶须和化学镀铜得到的Cu/T-ZnO晶须复合粉体进行了电磁参数的测量.微波电磁性能试验表明,化学镀后晶须的微波吸收性能明显增加,在频率为13GHz处反射率可达-12dB左右,而且最大吸收峰的频率随铜析出量的不同而发生改变,这样有利于实现吸收频带的展宽.

The composite powders of tetrapod-shaped ZnO whiskers (T-ZnO whiskers) coated with Cu shell were prepared by electroless plating technique. The components and morphology of the powders were studied by scanning electron microscopy (SEM), energy dispersive spectrometry (EDS) and X-ray diffraction (XRD) analysis. It was demonstrated that the pure zinc oxide powders had a hexagonal structure and the chemical composition of the coated layer was copper. The whiskers were tetrapod-shaped structure. The electromagnetic parameters of the powders were measured with varying shell thickness. It was shown that the absorption Cu/T-ZnO towards microwaves increased significantly.