Preparation and microwave absorption property of Ni/Al powder  

作　　者：Shen Xu Pantao Li Xiaolei Su Yi Liu 

机构地区：[1]School of Materials Science&Engineering Xi’an Polytechnic University No.19,Jinhua South Road,Xi’an 710048,P.R.China

出　　处：《Journal of Advanced Dielectrics》2024年第4期80-91,共12页先进电介质学报（英文）

基　　金：support from the Scientific Research Program Funded by Education Department of Shaanxi Provincial Government(Program No.23JC036);Scientific and Technological Plan Project of the Xi’an Science and Technology Bureau(Program No.23KGDW0031-2022).

摘　　要：As a functional composite material,nickel-coated aluminum powder has been widely used in conductive fillers,electromagnetic shielding materials and other fields due to its advantages of low density,high conductivity and low cost.In this paper,nickel-plated aluminum powder was prepared by a sodium hypophosphite system.The effects of different nickel coating amounts(the percentage of nickel-plating quality to nickel-plated aluminum powder quality)on the morphology,phase,compaction resistivity and electromagnetic parameters of nickel-plated aluminum powder coating were studied.The X-Ray Diffraction(XRD)results proved the successful preparation of nickel-coated aluminum powders with different nickel coating amounts.The Scanning Electron Microscope(SEM)images clearly show the coating effect under different nickel coating amounts.By plating nickel on the surface of aluminum powder,the surface characteristics of aluminum powder are changed,so as to adjust its conductivity,resistance,stability and other properties,thus affecting its electromagnetic performance and wave absorption performance.The results show that the comprehensive absorbing performance is excellent when the nickel coating amount is 40%.The reflection loss of the sample with a thickness of 2.0mm is less than-10 dB in the frequency range of 10.17–12.38 GHz.When the frequency is 10.72 GHz,the minimum reflection loss reaches33:17 dB.

关 键 词：Nickel-coated aluminum powder sodium hypophosphite nickel coating amount absorbing performance 

分 类 号：TM2[一般工业技术—材料科学与工程] TB33[电气工程—电工理论与新技术]