Magnetic metal doped vanadium nitride nano-composite fiber microwave absorbent and preparation method thereof

A technology of vanadium nitride nanometer and microwave absorber, applied in chemical instruments and methods, chemical characteristics of fibers, other chemical processes, etc., can solve the problems of easy agglomeration, reducing magnetic permeability and magnetic loss, and deteriorating wave absorbing performance, etc. Achieving good absorbing performance, large aspect ratio, and improving absorbing performance
CN110894624APending Publication Date: 2020-03-20SHAANXI UNIV OF SCI & TECH
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Patent Information

Authority / Receiving Office
CN · China
Current Assignee / Owner
SHAANXI UNIV OF SCI & TECH
Publication Date
2020-03-20

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Abstract

The invention discloses a magnetic metal doped vanadium nitride nano-composite fiber microwave absorbent and a preparation method thereof. Vanadium acetylacetonate and polyvinylpyrrolidone are added into a N,N-dimethylformamide solvent, and dissolved via stirring to acquire a mixed solution; then a magnetic metal precursor is added into the mixed solution, and the mixed solution is stirred under room temperature to acquire electrospinning fluid; the acquired electrospinning fluid is formed into one-dimensional nanofibers via electrospinning; the prepared nanofibers are subjected to pre-oxidation, and then nitrogen treatment is performed to acquire the Fe / (Co,Ni)VN / C nanofiber electromagnetic microwave absorbent. The magnetic metal doped vanadium nitride nano-composite fiber microwave absorbent prepared according to the invention is complete in shape, large in length-diameter ratio, stable in structure, simple in preparation method, excellent in repeatability and good in microwave absorption performance, and effectively improves the microwave absorption performance of vanadium nitride.
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Description

technical field

[0001] The invention belongs to the technical field of microwave absorbing materials, and in particular relates to a magnetic metal-doped vanadium nitride nanocomposite fiber microwave absorber and a preparation method thereof. Background technique

[0002] In recent years, with the rapid development of the electrical and electronic industry, the problem of electromagnetic radiation has become increasingly serious. In the military field, the radar stealth of military targets can achieve rapid and precise strikes on enemy targets on the premise of ensuring the safety of their own weapons and equipment. Electromagnetic wave absorbing materials can attenuate and absorb electromagnetic waves by converting electromagnetic energy into heat energy and other forms of energy, which can solve the problems of electromagnetic pollution and radar stealth to a large extent. Therefore, based on the needs of national defense and electromagnetic pollution protection, it is i...

Claims

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
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