Cobalt-based amorphous nanometer wave-absorbing material and synthetic method of cobalt-based amorphous nanometer wave-absorbing material

Abstract

The invention relates to a cobalt-based amorphous nanometer wave-absorbing material and a synthetic method of the cobalt-based amorphous nanometer wave-absorbing material, and relates to amorphous nanometer wave-absorbing materials. The synthetic method includes the steps of (1) dissolving metal salt in water to obtain a metal salt water solution, (2) containing the metal salt water solution prepared in the step (1) in a reaction vessel, and leading nitrogen in the reaction vessel under the magnetic stirring conditions to remove oxygen in a system, (3) dissolving sodium borohydride solid powder in water to obtain a sodium borohydride water solution, and (4) injecting the sodium borohydride water solution prepared in the step (3) into the metal salt water solution in the step (2) to obtain black muddy liquid after a reaction is finished, conducting centrifugation to obtain cobalt-based amorphous nanocrystallines after obtained sediments are washed, then drying the cobalt-based amorphous nanocrystallines, mixing obtained dried samples and solid paraffin, heating the mixture, and then conducting resolidification to obtain the cobalt-based amorphous nanometer wave-absorbing material, wherein the cobalt-based amorphous nanometer wave-absorbing material can be pressed into annular samples. The synthetic method is simple, high in operability, soft in preparation condition, clean and free of pollution in the reaction process, high in reaction efficiency and high in reproducibility.

Description

technical field [0001] The invention relates to an amorphous nano wave-absorbing material, in particular to a cobalt-based amorphous nano-wave absorbing material and a synthesis method thereof. Background technique [0002] With the development of science and technology, the use of electronic equipment is becoming more and more extensive, and electromagnetic radiation pollution is becoming more and more serious, gradually becoming the "fourth largest public hazard" of society. Electromagnetic radiation will not only interfere with the normal operation of electronic instruments and equipment, but also affect people's physical and mental health. In the military, the international competition of weapons and equipment is becoming increasingly fierce. With the development of detection technology, the realization of target stealth in war is of great significance to improve the survival and penetration strike capabilities of weapon systems. At present, the most effective way to so...

AI Technical Summary

Problems solved by technology

When the particle size of the material is on the nanometer scale (1-100nm), the quantum effect causes the electron energy to split, and the split energy level interval is in the energy range corresponding to the microwave (10 -2 ~10 -5 Within eV), a new wave-absorbing effect will be produced; the size of nanoparticles is small, the specific surface area is large, the proportion of surface atoms is high, the number of unsaturated bonds and dangling bonds increases, and interface polarization and multiple scattering become important wave-absorbing mechanisms; in addition, magnetic Nanoparticles (Xiao-Ling Shi, Mao-Sheng Cao, Jie Yuan, and Xiao-Yong Fang, Applied Physics Letters, 2009, 95(16): 163108.) have high coercivity and can cause large hysteresis loss

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