【作者】 张敬杰； 宋广智； 刘新厚；

【Author】 Zhang Jingjie Song guangzhi Liu Xinhou (Technical Institute of Physics and Chemistry Chinese Academy of Sciences)

【机构】 中国科学院理化技术研究所；

【摘要】 采用软化学合成技术制备的非晶态二氧化硅空心微球具有轻质、高强度、耐高温、低介电常数、低导热系数以及低吸收、低反射的高透波等特性。通过微球表面纳米涂膜技术,将纳米尺寸的电损耗性介电吸波材料如金属粉末、导电碳黑,碳化硅等物质以及磁损耗性材料如铁氧体等物质包覆在空心微球的表面达到吸波的目的。这种由里到外依次为空心微球,损耗层或绝缘层等单层或多层纳米粒子微波吸收层的轻质、高强度空心微球可以用来作为轻质、宽频带、强吸收、红外线与微波吸收兼容综合性能很好的隐身吸波材料。这种空心微球表面镀覆的纳米尺寸多元复合吸波材料层结构可以通过精心设计、综合加工使电磁损耗和阻抗匹配兼容,将多种材料的优良性能通过多元匹配复合,使得电磁参数可调,让电阻型损耗、介电损耗、磁损耗有效地结合在一起,形成更好的协同效应,从而制得较为理想的隐身吸波材料。更多还原

【Abstract】 Hollow microsphere material of amorphous silicon dioxide prepared by using the technology of soft chemical synthesis has the properties of light weight, high strength, high temperature resistance, low dielectric constant, low thermal conductivity as well as high capacity of microwave permeance with low absorption and low reflection of microwave. Microwave-absorption microsphere can be fabricated by coating dielectric microwave-absorbing materials , which have the properties of electrical loss such as metal powder, electrical conduction black carbon etc. and with materials causing magnetic loss such as ferrite, both of that materials are in the size of nanometer, on the surface of hollow microsphere. Such hollow microsphere with single layer or multilayer of microwave-absorption layer(s) made of wastage layer or insulation layer etc. consisting of particles in nano size from inner to outer, in turn, can be used as latent material that have the excellent integrate properties of light weight, broad-bandwidth, strong absorption, both IR and microwave absorption. This kind of microspheres coated on its surface with multi-element composite of microwave-absorption material in size of nanometer can be made compatible to both electric-magnetic loss and impedance matching by aborative design and comprehensively processing, and the electric-magnetic parameters can be adjusted by matching and composition the good performances of multiplicate materials, so that make the insulation loss, dielectric loss and magnetic loss combined together, getting better synergetic effect This kind of microspheres can be used as an ideal latent material.更多还原