1results about How to "Effective frequency bandwidth" patented technology

The present application relates to electromagnetic wave absorption technical field, especially to a kind of carbon nanometer load cobalt ferrite composite wave-absorbing material and preparation method thereof, comprising the following steps: 1) soluble iron salt, soluble cobalt salt is dispersed in water, and complexing agent is added, and cobalt ferrite powder is obtained by sol-gel reaction;2) soluble biomass saccharide is dispersed in deionized water, and a solution with a certain concentration is prepared, cobalt ferrite powder is added to the solution for aging immersion, and then the solid-liquid mixture is suction filtered, the filter cake is air dried, and the cobalt ferrite powder with uniform carbon source loading is obtained;3) the cobalt ferrite powder with carbon source loading is calcined under inert atmosphere, and the composite wave-absorbing material is prepared.The wave-absorbing material prepared by the present application has the characteristics of light weight, strong absorption, effective absorption bandwidth, easy-to-control wave-absorbing performance, etc.In addition, the preparation method used in the present application is simple, raw materials are easy to obtain, cost is low, green and environmentally friendly, and more conducive to industrial application.