Rare earth metal ferroalloy wave-absorbing agent, preparation method and application thereof

A technology of rare earth metals and rare earth metal salts, used in radiation-absorbing coatings, coatings, anti-corrosion coatings, etc., can solve the problems of low stability and easy oxidation of absorbing materials, and achieve the best effect of stability

Active Publication Date: 2018-01-26
INST OF IND TECH GUANGZHOU & CHINESE ACADEMY OF SCI
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0004] Based on this, it is necessary to provide a rare-earth metal-iron alloy microwave absorber and its preparation and application in view of the existing wave-absorbing materials that are easily oxidized and have low stability.

Method used

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  • Rare earth metal ferroalloy wave-absorbing agent, preparation method and application thereof
  • Rare earth metal ferroalloy wave-absorbing agent, preparation method and application thereof
  • Rare earth metal ferroalloy wave-absorbing agent, preparation method and application thereof

Examples

Experimental program
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Effect test

Embodiment 1

[0034] This embodiment provides a ferrocerium alloy wave absorbing agent and its preparation and application, specifically as follows:

[0035] (1) Accurately weigh 297g of ferric nitrate (relative molecular weight relative molecular mass is 241.88, the quality of iron is 68.8g), 3g of cerium nitrate (relative molecular weight is 434.12, the quality of cerium is 0.97g) in the container, dissolve in deionized water Make a mixed solution; add 200g, 50wt% acetic acid solution and stir evenly to obtain a uniform and stable solution;

[0036] Add dropwise ammonia water of 25% concentration to the solution, adjust the pH value to 7, so that a precipitate is produced until the amount of ammonia water is slightly excessive, filter and collect the precipitate, place the collected precipitate in a constant temperature drying oven at 120°C for 6 hours, and then Calcined at 400-500°C, cooled and ground to collect the 400-mesh sieve to obtain iron cerium oxide powder;

[0037](2) Place th...

Embodiment 2

[0041] This embodiment provides a ferrocerium alloy wave absorbing agent and its preparation and application, specifically as follows:

[0042] (1) Accurately weigh 293g of ferric sulfate (the relative molecular weight is 399.86, and the quality of iron is 82.07g), 7g of cerium nitrate (the relative molecular weight is 434.12, and the quality of cerium is 2.26g), and dissolve them in deionized water to form a mixed solution. Add 200g50wt% acetic acid solution and stir evenly to obtain a uniform and stable solution;

[0043] Add dropwise ammonia water of 25% concentration to the solution, adjust the pH value to 7, so that a precipitate is produced until the amount of ammonia water is slightly excessive, filter and collect the precipitate, place the collected precipitate in a constant temperature drying oven at 120°C for 6 hours, and then Calcined at 400-500°C, cooled and ground to collect the 400-mesh sieve to obtain iron cerium oxide powder;

[0044] (2) Place the iron-cerium...

Embodiment 3

[0048] This embodiment provides a ferrocerium alloy wave absorbing agent and its preparation and application, specifically as follows:

[0049] (1) Accurately weigh 295g of ferric chloride (the relative molecular weight is 162.204, and the quality of iron is 101.85g), 5g of cerium sulfate (the relative molecular weight is 404.30, and the quality of cerium is 3.47g), dissolve in deionized water and form a mixed solution. Add 200g of 50wt% acetic acid solution and stir evenly to obtain a uniform and stable solution; add dropwise ammonia water of 25% concentration to the solution, adjust the pH value to 7, and produce a precipitate until the ammonia water is slightly excessive, filter and collect the precipitate, and collect the The precipitate was dried in a constant temperature drying oven at 120°C for 5 hours, then calcined at 400-500°C, cooled and ground to collect the 400-mesh sieve to obtain iron cerium oxide powder;

[0050] (2) Place the iron-cerium oxide powder in a hyd...

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Abstract

The invention provides a rare earth metal ferroalloy wave-absorbing agent, a preparation method and application thereof. The preparation method includes: dissolving a soluble iron salt and a soluble rare earth metal salt in water, and adding organic acid into the obtained salt solution to form a mixed solution; adding an excessive alkaline solution into the mixed solution to produce a precipitate,collecting the precipitate, performing washing to neutral, and conducting drying; calcining the dried precipitate, grinding the calcined precipitate, and performing sieving to obtain a rare earth metal composite oxide; putting the composite oxide in a hydrogen atmosphere, performing heating, and carrying out reduction reaction to obtain a rare earth metal ferroalloy; putting the rare earth metalferroalloy in grinding equipment, adding a grinding aid for grinding, and letting the grinding aid wrap the surface of the rare earth metal ferroalloy, thus forming the rare earth metal ferroalloy wave-absorbing agent. The wave-absorbing agent prepared by the method provided by the invention has the advantages of difficult oxidization in air, stable process, good repeatability and obvious absorption effect on radar wave, thus having broad application prospects in the field of radar wave stealth.

Description

technical field [0001] The invention belongs to the technical field of functional materials, and relates to a rare-earth metal-iron alloy wave absorbing agent and a preparation method and application thereof. Background technique [0002] With the progress and development of modern civilization, science and technology are more and more developed, and people's living environment is filled with more and more complex electromagnetic environment, which poses a potential threat to human health. At the same time, in order to meet the needs of modern warfare, stealth technology has received widespread attention and has become a key military research hotspot in various countries. As a traditional microwave-absorbing material, metal micropowder has the advantages of high Curie temperature, high magnetization, high microwave permeability, and high dielectric constant, and has been widely used in the vicinity of microwave-absorbing materials. Metal powder mainly absorbs electromagneti...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C09D163/00C09D5/32C09D5/10C09D7/62C22C33/02
Inventor 孙成军王柱刘海峰哈成勇胡志忠
Owner INST OF IND TECH GUANGZHOU & CHINESE ACADEMY OF SCI
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