Electromagnetic wave absorbing material of monodisperse nanometer ferriferrous oxide hollow ball, its preparation method and application

Abstract

The invention relates to an electromagnetic wave absorbing material of monodisperse nanometer ferriferrous oxide hollow ball-shaped, its preparation method and application. The ferriferrous oxide hollow ball consists of monodisperse hollow balls with different sizes from 300 to 900 nm, the diameter of an internal hollow part is approximately from 100 to 300 nm, a housing is composed of ferriferrous oxide with different sizes from 50 to 100 nm, the thickness is approximately from 50 to 300 nm. Ferric sulfate and the like are used as a precursor, ethene diamine and the like are used as a foaming agent, one or a combination of polyvinyl alcohol, polymethyl methacrylate and polyvinylpyrrolidone is used as a stabilizing agent. The precursor, the foaming agent and the stabilizing agent are dissolved into a triglycol solvent or a glycol solvent, and directly synthesized for 5 to 80 hours under the temperature from 100 to 300 DEG C to obtain. The obtained nanometer ferriferrous oxide hollow ball material has the advantages of good stability and uniformity, and has good electromagnetic wave absorbing performance as well as strong corrosion-resisting and antioxidation ability. The monodisperse nanometer ferriferrous oxide hollow ball material provided in the invention can be used as the electromagnetic wave absorbing material.

Description

technical field [0001] The invention relates to a magnetic material of nanometer ferric oxide hollow spheres and a preparation method and application thereof, and belongs to the technical field of magnetic and electromagnetic wave absorbing materials. Background technique [0002] With the rapid development of radio technology, electromagnetic wave technology has occupied a pivotal position in military and civilian fields. Stealth technology has always been a hotspot in military research in various countries, and electromagnetic wave shielding technology has naturally become a research hotspot in civilian use because microwave radiation has seriously affected human health. In this context, electromagnetic wave absorbing materials, as an effective means to reduce electromagnetic wave interference, can convert electromagnetic waves into other forms of energy and attenuate them. [0003] Magnetic loss, dielectric loss and conductive loss materials can all be used as electromag...

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Problems solved by technology

So far, there have been no relevant reports on the use of nano-Fe3O4 hollow spheres as electromagnetic wave absorbers in the GHz range at home and abroad.

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