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Samarium iron/graphene nano composite material for absorbing electromagnetic waves and preparation method of samarium iron/graphene nano composite material

A nanocomposite material and electromagnetic wave technology, applied in nanotechnology, electrical components, metal processing equipment, etc., to achieve high reflection loss intensity, excellent electromagnetic parameter matching effect, and low density

Inactive Publication Date: 2022-07-01
BEIHANG UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

Due to the limitation of the preparation method, it is still not possible to prepare light-weight and easy-to-face anisotropic magnetic rare earth compounds and their composites with excellent electromagnetic wave absorption properties.

Method used

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  • Samarium iron/graphene nano composite material for absorbing electromagnetic waves and preparation method of samarium iron/graphene nano composite material
  • Samarium iron/graphene nano composite material for absorbing electromagnetic waves and preparation method of samarium iron/graphene nano composite material
  • Samarium iron/graphene nano composite material for absorbing electromagnetic waves and preparation method of samarium iron/graphene nano composite material

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0020] Sm with excellent electromagnetic wave absorption properties such as absorption frequency bandwidth and light weight of absorbing materials 2 Fe 17 / 7%rGO nanocomposites, wherein the mass fraction of rGO is 7%, Sm 2 Fe 17 The mass fraction of alloy nanoparticles is 93%, Sm 2 Fe 17 The molar ratio of Sm and Fe elements in the alloy nanoparticles is 2:17, and the amorphous Sm 2 Fe 17 The average particle size of the alloy nanoparticles is about 170 nm, and the preparation steps are as follows:

[0021] (1) Dissolve 100 mg of GO powder in 50 ml of deionized water and disperse it with ultrasonic waves for 3 hours to obtain a GO suspension solution with a certain concentration of 2 mg / ml;

[0022] (2) Weigh 1.4230g FeCl respectively 2 ·4H 2 O and 0.3072g SmCl 3 ·6H 2 O, it is completely dissolved in 10ml of ionized water by stirring, and the molar ratio of samarium element and iron element is 2:17;

[0023] (3) Weigh 0.45g of PVP and dissolve it in the Sm-containi...

Embodiment 2

[0033] Sm with excellent electromagnetic wave absorption properties such as absorption frequency bandwidth and light weight of absorbing materials 2 Fe 15.5 / 6.6%rGO nanocomposite, in which the mass fraction of rGO is 6.6%; Sm 2 Fe 15.5 The mass fraction of alloy nanoparticles is 93.4%, Sm 2 Fe 15.5 The molar ratio of Sm and Fe elements in the alloy nanoparticles is 2:15.5, and the amorphous Sm 2 Fe 15.5 The average particle size of the / 6.6% rGO alloy nanoparticles is about 130 nm, and the preparation steps are as follows:

[0034] (1) Dissolve 350 mg of GO powder in 50 ml of deionized water and disperse it with ultrasonic waves for 2 hours to obtain a GO suspension solution with a certain concentration of 7 mg / ml;

[0035] (2) Weigh 1.4082g FeCl respectively 2 ·4H 2 O and 0.3344g SmCl 3 ·6H 2 O, it is completely dissolved in 10ml ionized water by stirring, and the molar ratio of samarium element and iron element is 2:15.5;

[0036] (3) Weigh 0.3 g of PVP and disso...

Embodiment 3

[0042] It has excellent electromagnetic wave absorption properties such as absorption frequency bandwidth and light weight of absorption material SmFe 2 / 3%rGO nanocomposites, wherein the mass fraction of rGO is 3%; SmFe 2 The mass fraction of alloy nanoparticles is 97%, SmFe 2 The molar ratio of Sm and Fe elements in the alloy nanoparticles is 1:2, and the amorphous SmFe is 2 The average particle size of the alloy nanoparticles is 125 nm, and the preparation steps are as follows:

[0043] (1) Dissolve 50 mg of GO powder in 50 ml of deionized water and disperse it with ultrasonic waves for 2 hours to obtain a GO suspension solution with a certain concentration of 1 mg / ml;

[0044] (2) Weigh 1.060g FeCl respectively 2 ·4H 2 O and 0.9704g SmCl 3 ·6H 2 O, it is completely dissolved in 10ml of ionized water by stirring, and the molar ratio of samarium element and iron element is 1:2;

[0045] (3) Weigh 0.2 g of PVP and dissolve it in the Sm-containing Sm prepared in the abo...

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Abstract

The invention discloses a samarium-iron (Sm-Fe) / reduced graphene oxide (rGO) nano composite material for absorbing electromagnetic waves and a preparation method thereof in the field of magnetic materials. A liquid phase reduction method is adopted, sodium borohydride is used as a reducing agent to carry out co-reduction on samarium ions (Sm < 3 + >), iron ions (Fe < 2 + >) and graphene oxide (GO) to form spherical amorphous Sm-Fe alloy nanoparticles, and the spherical amorphous Sm-Fe alloy nanoparticles are uniformly pinned on the surface of rGO to obtain the Sm-Fe / rGO nanocomposite. The magnetic alloy-conductive carbon nano composite material based on the easy-surface magnetic anisotropy Sm-Fe rare earth compound has the advantages of low density, good intrinsic magnetism, large specific surface area and excellent electromagnetic parameter matching effect; in an electromagnetic wave absorption test, the wave-absorbing coating has excellent electromagnetic wave absorption properties such as thin thickness, high reflection loss intensity and wide electromagnetic wave absorption spectrum, can be used for broadband and light electromagnetic wave absorbing materials, and has wide application prospects in the fields of electronic information, equipment and device stealth, aerospace and the like. The preparation method has the advantages of abundant raw material sources, simple preparation technology, environmental friendliness, suitability for industrial production and the like.

Description

technical field [0001] The invention relates to a nanostructured rare earth metal compound and the technical field of preparation thereof, in particular to a magnetic rare earth alloy-carbon nanocomposite material with excellent electromagnetic wave absorption performance and a preparation method thereof. Background technique [0002] High-performance electromagnetic wave absorbing materials have broad application prospects in many industrial and civil fields such as modern electronics and electrical engineering, aerospace, weaponry and medical protection. Magnetic wave absorbing materials with the characteristics of wide absorption frequency band, light weight of absorbing material, thin absorbing coating and high electromagnetic wave absorption intensity have always been an important content of electromagnetic materials research. At present, the research and application of electromagnetic wave absorbing materials focus on three types of materials: magnetic loss type, elect...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B22F9/24B22F1/18B22F1/08B22F1/054H05K9/00B82Y40/00
CPCB22F9/24B22F9/002H05K9/0081B82Y40/00
Inventor 杨白朱童于荣海
Owner BEIHANG UNIV
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