摘要
以聚四氟乙烯（PTFE）微孔膜作为模板，在膜相渗透化学镀法制备金属-PTFE复合膜的基础上，引入外电场的作用，制备了NiCo／PTFE磁性复合膜。实验考察了外加电场对沉积金属形貌和复合膜性能的影响。采用扫描电镜观察PTFE膜孔中金属粒子的形貌，通过3mm雷达波反射率测试场考察了复合膜的吸波性能。结果表明，NiCo粒子在PTFE膜孔中为球形颗粒；外加电场的作用使复合膜中沉积的NiCo粒子的粒径分布范围从0．28～O．78,um减小到0．25～0．31μm；性能测试表明，在75～96GHz波段范围内，该复合膜的衰减反射均在-10dB以上，并在84．3GHz时达到-15．5dB，表明在外加电场下合成的NiCo／PTFE磁性复合膜有优良的微波吸收特性。
Using PTFE micro-porous polymer membrane as the template,the Ni-Co/PTFE composite membranes were fabricated under different conditions. Based on a developed in-situ permeation electroless plating method,the electric field was incorporated into the fabrication process. The effect of the applied electric field on the morphology of the deposited metal and the performance of the composite membrane was studied. SEM technique was applied to view the micro-morphologies of metal-polymer composite membranes. The microwave absorption performance of the composite membrane was then investigated by 3 mm radar wave reflectivity testing field. SEM images showed that the Ni-Co particles appeared the spherical shape in PTFE membrane pores. After incorporating the electric field into the fabrication process,the size distributions of the deposited Ni-Co particles in the composite membrane decreased from 0.28 -0.78μm to 0.25-0.31 μm,and a nano-size metal wire appeared. The performance testing showed that the attenuation reflection of the composite membrane was bigger than --10 dB at the band of 75- 96 GHz and up to --15.5 dB at the band of 84.3 GHz. This indicated that the Ni-Co/PTFE magnetic composite membrane fabricated in the applied electric field had very good microwave absorption performance.
出处
《压电与声光》
CSCD
北大核心
2009年第2期237-239,243,共4页
Piezoelectrics & Acoustooptics
基金
重庆市自然科学基金资助项目(CSTC2006BB4002)
重庆大学研究生创新基金资助项目(200701Y1B0120198)
关键词
膜相渗透
化学镀
电场作用
磁性复合膜
吸波特性
in-situ permeating
electroless plating
electric field
magnetic composite membrane
microwave absorption performance
