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Method for preparing three-layer composite wave-absorbing material according to one-step method

A technology of wave absorbing material and layer compounding, applied in the manufacture of rayon, single-component synthetic polymer rayon, chemical characteristics of fibers, etc., can solve the problems of high density, single absorption frequency band, weak absorption, etc.

Active Publication Date: 2019-01-15
北京军通新材科技有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Excellent absorbing materials are required to have the characteristics of strong absorption, wide frequency band, low density, thin thickness, and good environmental stability. However, traditional absorbing materials are difficult to meet the above comprehensive requirements. The main problems are single absorption frequency band, high density, poor absorption Strong and other issues

Method used

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  • Method for preparing three-layer composite wave-absorbing material according to one-step method

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0031] The one-step method for preparing a three-layer composite absorbing material of the present invention includes the following steps: preparing FeB blocks, metal Zr blocks, and metal Co blocks; putting the FeB blocks, metal Zr blocks and metal Co blocks into a crucible and performing vacuum melting, Obtain Fe alloy ingot, wherein the molecular formula of Fe alloy ingot is Fe 100-a-b-c Zr a B b Co c , Where a=5, b=5, c=2; crush the Fe alloy ingot and ball mill to obtain Fe alloy powder; prepare Fe powder, and ball mill the Fe powder to obtain nano ferrite powder; prepare and mix Cu powder, chopped PAN fiber and graphite powder to obtain Cu mixed powder; sinter the Cu mixed powder to obtain Cu ingot; crush and ball mill the Cu ingot to obtain modified Cu powder; dissolve PAN powder in DMF , Obtain PAN spinning solution, wherein the PAN concentration is 10wt%; dissolve Fe alloy powder in PAN spinning solution to obtain Fe alloy powder spinning solution, and dissolve nano ferri...

Embodiment 2

[0033] The one-step method for preparing a three-layer composite absorbing material of the present invention includes the following steps: preparing FeB blocks, metal Zr blocks, and metal Co blocks; putting the FeB blocks, metal Zr blocks and metal Co blocks into a crucible and performing vacuum melting, Obtain Fe alloy ingot, wherein the molecular formula of Fe alloy ingot is Fe 100-a-b-c Zr a B b Co c , Where a=10, b=9, c=4; crush and ball mill the Fe alloy ingot to obtain Fe alloy powder; prepare Fe powder and ball mill the Fe powder to obtain nano ferrite powder; prepare and mix Cu powder, chopped PAN fiber and graphite powder to obtain Cu mixed powder; sinter the Cu mixed powder to obtain Cu ingot; crush and ball mill the Cu ingot to obtain modified Cu powder; dissolve PAN powder in DMF , Obtain PAN spinning solution, wherein the PAN concentration is 15wt%; dissolve Fe alloy powder in PAN spinning solution to obtain Fe alloy powder spinning solution, and dissolve nano ferri...

Embodiment 3

[0035] The one-step method for preparing a three-layer composite absorbing material of the present invention includes the following steps: preparing FeB blocks, metal Zr blocks, and metal Co blocks; putting the FeB blocks, metal Zr blocks and metal Co blocks into a crucible and performing vacuum melting, Obtain Fe alloy ingot, wherein the molecular formula of Fe alloy ingot is Fe 100-a-b-c Zr a B b Co c , Where a=6, b=6, c=2.5; crush and ball mill the Fe alloy ingot to obtain Fe alloy powder; prepare Fe powder, and ball mill the Fe powder to obtain nano ferrite powder; prepare and mix Cu powder, chopped PAN fiber and graphite powder to obtain Cu mixed powder; sinter the Cu mixed powder to obtain Cu ingot; crush and ball mill the Cu ingot to obtain modified Cu powder; dissolve PAN powder in DMF , Obtain PAN spinning solution, wherein the PAN concentration is 11wt%; dissolve Fe alloy powder in PAN spinning solution to obtain Fe alloy powder spinning solution, and dissolve nano fer...

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Abstract

The invention provides a method for preparing a three-layer composite wave-absorbing material according to a one-step method, which comprises the steps of preparing an FeB block, a metal Zr block anda metal Co block; performing vacuum melting on the FeB block, the metal Zr block and the metal Co block to obtain an Fe alloy ingot, crushing the Fe alloy ingot, and carrying out ball milling to obtain Fe alloy powder; preparing Fe powder, and carrying out ball milling on the Fe powder to obtain nano ferrite powder; preparing and mixing Cu powder, short-cut PAN fibers and graphite powder to obtainCu mixed powder; sintering the Cu mixed powder to obtain a Cu ingot; crushing the Cu ingot, and carrying out ball milling to obtain modified Cu powder; preparing various PAN spinning solutions; placing the nano ferrite spinning solution in an outer syringe, placing the modified Cu powder spinning solution in a middle syringe, and placing the Fe alloy spinning solution in an inner syringe; and forming a three-layer composite wave-absorbing material in one step by using a coaxial electrospinning method. The wave-absorbing material prepared according to the method provided by the invention is higher in maximum reflection loss value and wider in effective absorption bandwidth.

Description

Technical field [0001] The invention relates to the technical field of layered materials, in particular to a method for preparing a three-layer composite wave absorbing material in one step. Background technique [0002] With the rapid development of electronic technology, electromagnetic waves are used in more and more fields, from mobile phones and microwave ovens in daily use to radars and missiles in the defense industry. In daily life, the widespread use of electromagnetic waves not only provides convenience, but also brings a lot of problems, affecting people’s physical and mental health, and interfering with the normal use of certain electronic equipment. In the military, the international competition for weapons and equipment is also becoming increasingly fierce. Target stealth is of great significance for improving the survivability and penetration capability of weapon systems. Excellent absorbing materials require strong absorption, bandwidth, low density, thin thickne...

Claims

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Application Information

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IPC IPC(8): D01D5/00D01F1/10D01F6/54
CPCD01D5/003D01D5/0069D01F1/10D01F6/54
Inventor 黄春梁
Owner 北京军通新材科技有限公司
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