Magnetic metal and carbon composite wave-absorbing material derived from layered double magnetic metal hydroxides and preparation method of magnetic metal and carbon composite wave-absorbing material

A magnetic metal and hydroxide technology, applied in the direction of magnetic/electric field shielding, electrical components, etc., can solve the problem of non-magnetism of the composite, achieve the effects of reducing weight and density, improving interface polarization, and excellent wave-absorbing performance

Pending Publication Date: 2022-08-02
GUILIN UNIV OF ELECTRONIC TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, in the LDH precursor, only organic ligands and metal cations are combined, and the complex is not magnetic

Method used

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  • Magnetic metal and carbon composite wave-absorbing material derived from layered double magnetic metal hydroxides and preparation method of magnetic metal and carbon composite wave-absorbing material
  • Magnetic metal and carbon composite wave-absorbing material derived from layered double magnetic metal hydroxides and preparation method of magnetic metal and carbon composite wave-absorbing material
  • Magnetic metal and carbon composite wave-absorbing material derived from layered double magnetic metal hydroxides and preparation method of magnetic metal and carbon composite wave-absorbing material

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0032] A preparation method of a layered double magnetic metal hydroxide-derived magnetic metal@carbon composite wave absorbing material, comprising the following steps:

[0033] 1) Take 0.6058g Fe (NO 3 ) 3 ·9H 2 O, 0.8724g Ni (NO 3 ) 2 ·6H 2 O, 0.4830g CH 4 N 2 O and 0.54g C 6 H 12 O 6 Dissolved in 50ml of deionized water in turn, magnetically stirred for 30min and mixed uniformly, the mixed solution was transferred to a 100ml high pressure reactor, hydrothermally reacted at 180°C for 12h, and the reaction product was vacuum filtered to obtain a dark brown precipitate. The brown precipitate was washed three times with deionized water and twice with absolute ethanol, and then the precipitate was dried in an oven at 60 °C for 12 h to obtain FeNi hydroxide (FeNi-LDH) precursor;

[0034] 2) The FeNi-LDH precursor obtained in step 1) was placed in a tube furnace, passed into a protective atmosphere of Ar, and sintered at 700 °C for 2 h to finally obtain a three-dimensio...

Embodiment 2

[0036] A preparation method of a layered double magnetic metal hydroxide-derived magnetic metal@carbon composite wave absorbing material, comprising the following steps:

[0037] 1) Take 0.6058g Fe (NO 3 ) 3 ·9H 2 O, 0.8724g Ni (NO 3 ) 2 ·6H 2 O, 0.4830g CH 4 N 2 O and 0.54g C 6 H 12 O 6 Dissolved in 50ml of deionized water in turn, magnetically stirred for 30min and mixed evenly, then the mixed solution was transferred to a 100ml high pressure reactor, hydrothermally reacted at 180°C for 12h, and the reaction product was subjected to vacuum filtration to obtain a dark brown precipitate, dark brown The precipitate was washed three times with deionized water and twice with anhydrous ethanol, and then the precipitate was placed in an oven at 60°C for 12 hours and dried to obtain FeNi hydroxide (FeNi-LDH) precursor;

[0038] 2) The FeNi-LDH precursor obtained in step 1) was placed in a tube furnace, passed into a protective atmosphere of Ar, and sintered at 800 °C for 2...

Embodiment 3

[0040] A preparation method of a layered double magnetic metal hydroxide-derived magnetic metal@carbon composite wave absorbing material, comprising the following steps:

[0041] 1) Take 0.6058g Fe (NO 3 ) 3 ·9H 2 O, 0.8730g Co (NO 3 ) 2 ·6H 2 O, 0.4830g CH 4 N 2 O and 0.54g C 6 H 12 O 6Dissolved in 50ml of deionized water in turn, magnetically stirred for 30min and mixed uniformly, the mixed solution was transferred to a 100ml high pressure reactor, hydrothermally reacted at 180 ° C for 12h, the reaction product was subjected to vacuum filtration to obtain a dark brown precipitate, dark brown The precipitate was washed three times with deionized water and twice with absolute ethanol, and then the precipitate was dried in an oven at 60 °C for 12 h to obtain FeCo hydroxide (FeCo-LDH) precursor;

[0042] 2) The FeCo-LDH precursor obtained in step 1) was placed in a tube furnace, poured into a protective atmosphere of Ar, sintered at 700 °C for 2 h, and finally a three-...

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Abstract

The invention discloses a layered double magnetic metal hydroxide derived magnetic metal and carbon composite wave-absorbing material and a preparation method thereof, the layered double magnetic metal hydroxide (LDH) is used as a precursor, and the magnetic metal and carbon composite wave-absorbing material with a multi-dimensional, multi-level and porous structure is synthesized through subsequent heat treatment. The preparation method is simple in process and low in cost, large-scale industrial production can be achieved, and the prepared composite wave-absorbing material is small in density, small in thickness, wide in effective absorption frequency band and high in reflection loss.

Description

technical field [0001] The invention relates to the technical field of electromagnetic wave absorbing materials, in particular to a layered double magnetic metal hydroxide-derived magnetic metal@carbon composite wave absorbing material and a preparation method thereof. Background technique [0002] With the development of radio technology and information industry, electronic products have been widely used, which has also brought a series of electromagnetic radiation problems, which have brought many impacts on people's production and life, and with the miniaturization of electronic technology. Therefore, eliminating electromagnetic interference, avoiding electromagnetic information leakage, and reducing electromagnetic radiation pollution have become key issues that need to be solved urgently in today's society. [0003] Layered dual magnetic metal hydroxides (LDHs), as a new class of materials with high specific surface area and abundant inner-layer interfaces, can be combi...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H05K9/00
CPCH05K9/0088H05K9/009
Inventor 甘芳瑜姚青荣成丽春邓健秋周怀营钟燕王江
Owner GUILIN UNIV OF ELECTRONIC TECH
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