Studies On Microwave Absorbing Properties Of Composite Ferrite Microwave Absorbing Materials

Microwave absorbing material is a kind of functional material,it is applied and developed in military technoligy, information and Environmental protection.The increasing environmental pollution from non-ionizing microwave irradiation due to the fast development in information and communication technology (ICT) has received high-recognition.soit becomes the hotspot that how to prevent Electro Magnetic Interference.The ability of ferrite materials to absorb microwaves is well known. Ferrites have been used as absorbers in reducing back scattering from objectsor radar targets. The recent development in absorber technology is to produce absorbers which are thin, flexible, strong and lowcost, These can be acheived by blending or mixing the p ure ferrites with other non-magnetic oxides. The practice has been found to change the absorption characteristics of the pure ferrites such as broadeningof the frequency for maximal absorption.In this paper,firstly Ni_xZn_<sub>1-xFe₂O₄ were prepared by chemical coprecipitation route, ,and The absorption properties were measured to find out the better content, then we study the influence of magnetic texture treatmrnt on composite materials, secondly (LiFe)_xZn_1-2xFe₂O₄ were prepared by a conventional solid-state reaction method ,and measured its structure with XRD,and The absorption properties were measured to find out the better content ,then the influences of mixing the p ure ferrites with other non-magnetic oxides. The absorption properties were measured, finally, composite material were prepared by adding LiZn ,NiZn ferrites to Sr hexaferrite ,and The microwave absorption properties were investigated.and mpedance matching design is briefly introduced. Three kinds of reticulation fibers-based absorption coats were prepared. Then the microwave absorption properties were investigated.It is found that the absorption property of Ni_0.55Zn_0.45Fe₂O₄ is best, and plumb...