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Wave-absorbing agent and preparation method thereof

A technology of wave absorbing agent and butyl titanate, applied in the field of wave absorbing materials, can solve the problems of poor absorption effect and single loss mechanism, achieve good wave absorption performance, improve low frequency wave absorption performance, improve surface activity and stability Effect

Inactive Publication Date: 2019-07-02
LUOYANG INST OF CUTTING EDGE TECH +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0003] As a typical magnetic loss absorbing material, carbonyl iron powder has the advantages of thin matching thickness, good absorption effect in the intermediate frequency band and excellent thermal stability, but it also has poor absorption effect at low frequencies (less than or equal to 5GHz), easy to be oxidized and loss mechanism single disadvantage

Method used

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  • Wave-absorbing agent and preparation method thereof
  • Wave-absorbing agent and preparation method thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0031] Add 500 parts of deionized water, 10 parts of polyvinylpyrrolidone and 5 parts of carbonyl iron powder in sequence in a beaker, electric stirring, and magnetic separation to obtain pretreated carbonyl iron powder;

[0032] Add 4 parts of butyl titanate to 5 parts of ethanol, stir magnetically until the liquid is uniformly mixed, heat to 60°C, then add 7 parts of glacial acetic acid dropwise to the solution, and stir to obtain a mixed solution of butyl titanate and acetic acid;

[0033] Add 2 parts of barium acetate into 7 parts of deionized water, heat to 70°C to fully dissolve the barium acetate to obtain an aqueous solution of barium acetate;

[0034] Afterwards, 12 parts of barium acetate aqueous solution was added dropwise to 8 parts of butyl titanate acetic acid mixed solution at a constant temperature of 40°C until the addition was complete, a sol was formed after magnetic stirring for 1 hour, ammonia water was added dropwise to adjust the pH to 4, and 25 parts of...

Embodiment 2

[0036]Add 520 parts of deionized water, 12 parts of polyvinylpyrrolidone and 4 parts of carbonyl iron powder in sequence in the beaker, electric stirring, magnetic separation and separation to obtain pretreated carbonyl iron powder;

[0037] Add 4 parts of butyl titanate to 5 parts of ethanol, stir magnetically until the liquid is uniformly mixed, heat to 55°C, then add 6 parts of glacial acetic acid dropwise to the solution, and stir to obtain a mixed solution of butyl titanate and acetic acid;

[0038] Add 3 parts of barium acetate to 5-9 parts of deionized water, heat to 70°C to fully dissolve the barium acetate to obtain an aqueous solution of barium acetate;

[0039] Afterwards, 12 parts of barium acetate aqueous solution was added dropwise to 8 parts of butyl titanate acetic acid mixed solution at a constant temperature of 45°C until the addition was complete, a sol was formed after magnetic stirring for 1.5 hours, and ammonia water was added dropwise to adjust the pH to ...

Embodiment 3

[0041] Add 520 parts of deionized water, 8 parts of polyvinylpyrrolidone and 4 parts of carbonyl iron powder in sequence in the beaker, electric stirring, magnetic separation and separation to obtain pretreated carbonyl iron powder;

[0042] Add 5 parts of butyl titanate to 5 parts of ethanol, stir magnetically until the liquid is uniformly mixed, heat to 60°C, then add 7 parts of glacial acetic acid dropwise to the solution, and stir to obtain a mixed solution of butyl titanate acetic acid;

[0043] Add 3 parts of barium acetate into 8 parts of deionized water, heat to 75°C to fully dissolve the barium acetate to obtain an aqueous solution of barium acetate;

[0044] After that, 11 parts of barium acetate aqueous solution was added dropwise to 8 parts of butyl titanate acetic acid mixed solution at a constant temperature of 45°C until the addition was complete. After magnetic stirring for 2 hours, a sol was formed, and ammonia water was added dropwise to adjust the pH to 5. Ad...

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Abstract

The invention provides a wave-absorbing agent and a preparation method thereof. The preparation method comprises the following steps: adding butyl titanate into ethanol to obtain a butyl titanate ethanol solution, and then adding acetic acid to obtain a butyl titanate-acetic acid mixed solution; adding barium acetate into first deionized water, and carrying out heating to a temperature T to obtaina barium acetate water solution; and adding the barium acetate water solution into the butyl titanate-acetic acid mixed solution for forming a sol, then adjusting the pH value, adding pretreated carbonyl iron powder, and carrying out stirring, centrifuging, drying and calcining to obtain the wave-absorbing agent. According to the wave-absorbing agent prepared by the method disclosed by the invention, low-frequency wave-absorbing performance of the wave-absorbing agent is remarkably improved, and wave-absorbing performance in a range of 2-5 GHz is good.

Description

technical field [0001] The present invention relates to absorbing materials, more specifically, to a Fe / BaTiO 3 A core-shell material wave absorber and a preparation method thereof. Background technique [0002] With the development of electronic science and technology, electronic information equipment has been widely used in all walks of life. The influence of electromagnetic waves on human beings has also penetrated into every corner. It is irreplaceable in mechanical, electronic and biological fields. While electromagnetic technology has brought great convenience to people, it has also seriously attracted serious electromagnetic radiation pollution. Electromagnetic radiation will not only interfere with electronic instruments and equipment, causing them to malfunction, but also affect human health, interfere with normal physiological functions of the human body, and may even cause diseases. Therefore, wave-absorbing materials for controlling electromagnetic pollution ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C09K3/00H05K9/00
CPCC09K3/00H05K9/0081C09D5/32H05K9/00
Inventor 不公告发明人
Owner LUOYANG INST OF CUTTING EDGE TECH