摘要
用化学镀方法将镍磷合金负载在膨胀石墨(EG)表面上从而制备了Ni-P/EG复合电磁屏蔽材料。扫描电镜观察表明,这种用化学镀制备的镍磷镀层紧密地附着在膨胀石墨基体上。X射线衍射分析显示,制备态镍磷镀层呈非晶态,经500℃热处理晶化后镀层呈多相结构。磁测量结果证实非晶镀层饱和磁化强度较低,热处理晶化后饱和磁化强度增大、矫顽力较小,呈软磁性。当晶化后的镍磷/膨胀石墨复合材料面密度为0.96 kg/m2时,按SJ20524-95标准测得的电磁屏蔽效能在300 kHz～1.5 GHz范围内达到54～75 dB。
Ni-P alloy was loaded on the surface of expanded graphite（EG） by chemical plating to prepare a Ni-P/EG composite with electromagnetic radiation shielding effectiveness.Scanning electron microscope（SEM） results showed that the Ni-P layer was adhered tightly to the surface of EG.The X-ray diffraction（XRD） patterns and the magnetic measurements of the composite revealed that this chemical plated Ni-P layer is amorphous and had a low saturation magnetization.After crystallized at 500℃ for 3h in N2 atmosphere,the Ni-P layer demonstrates multi-phase components and its saturation magnetization increases and coercivity decreases,presenting soft magnetism.The electromagnetic shielding effectiveness（SE） measured according to the SJ20524-95 standard for crystallized Ni-P/EG composite with areal density of 0.96 kg/m^2 was 54 to 75 dB in the range of 300 kHz to 1.5 GHz.
出处
《磁性材料及器件》
CSCD
北大核心
2011年第2期32-36,共5页
Journal of Magnetic Materials and Devices
基金
国家863计划资助项目(2006AA03Z458)
国家自然科学基金资助项目(50977042)
江苏省科技厅高技术资助项目(BG2006031)
关键词
镍磷合金
膨胀石墨
形貌
相结构
磁性能
电磁屏蔽
Ni-P alloy
expanded graphite
topography
phase composition
magnetic properties
electro-magnetic radiations shielding
