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Composite wave-absorbing agent with electromagnetic wave-absorbing performance, and preparation method thereof

A technology of electromagnetic absorbing and absorbing agent, which is applied in the direction of electrical components, magnetic/electric field shielding, antennas, etc., and can solve problems such as high density, single loss mechanism, and limited absorbing performance

Active Publication Date: 2021-09-21
XIAN UNIV OF TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

At present, ferrite materials are widely used in the field of electromagnetic protection due to their excellent magnetic properties, low cost, good electrical and optical properties, but due to poor impedance matching of a single ferrite, single loss mechanism, high density, etc. The reason is that its absorbing performance is very limited, and ferrite is a magnetic loss material. A simple and effective way to improve its performance is to combine it with a dielectric loss material.

Method used

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  • Composite wave-absorbing agent with electromagnetic wave-absorbing performance, and preparation method thereof
  • Composite wave-absorbing agent with electromagnetic wave-absorbing performance, and preparation method thereof
  • Composite wave-absorbing agent with electromagnetic wave-absorbing performance, and preparation method thereof

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preparation example Construction

[0028] A preparation method of a composite wave-absorbing agent with electromagnetic wave-absorbing properties of the present invention comprises the following steps:

[0029] Step 1. Put Ti 3 AlC 2 The powder is mixed with hydrofluoric acid to obtain a mixed solution A;

[0030] In step 1, every 40mL of hydrofluoric acid needs 10mmol of Ti 3 AlC 2 .

[0031] Step 2. Stir the mixed solution A continuously for 24-30 hours at room temperature to obtain the mixed solution B;

[0032] In step 2, the stirring speed is 200-400r / min.

[0033] Step 3. Under the rotating speed of 4500-6500r / min, use a centrifuge to repeatedly centrifuge and wash the mixed solution B with deionized water until the pH value of the liquid is 6-7;

[0034] Step 4, the centrifuged product obtained in step 3 is dried in an oven to obtain a two-dimensional layered Ti 3 C 2 T X , the layered structure is conducive to the reflection and scattering of electromagnetic waves, T X refers to the exposed Ti...

Embodiment 1

[0046] A preparation method of a composite wave-absorbing agent with electromagnetic wave-absorbing properties, comprising the following steps:

[0047] Step 1. Put Ti 3 AlC 2 The powder is mixed with hydrofluoric acid to obtain a mixed solution A;

[0048] In step 1, every 40mL of hydrofluoric acid needs 10mmol of Ti 3 AlC 2 .

[0049] Step 2. Stir the mixed solution A continuously for 24 hours at room temperature to obtain the mixed solution B;

[0050] In step 2, the stirring speed is 200r / min.

[0051] Step 3. At a rotational speed of 4500r / min, use a centrifuge to repeatedly centrifuge and wash the mixed solution B with deionized water until the pH value of the liquid is 6;

[0052] Step 4, the centrifuged product obtained in step 3 is dried in an oven to obtain Ti 3 C 2 T X ;

[0053] In step 4, the drying temperature is 60° C.; the drying time is 10 hours.

[0054] Step 5, weigh raw materials according to the following molar mass ratio: CoCl 2 ·6H 2 O: FeCl...

Embodiment 2

[0065] A preparation method of a composite wave-absorbing agent with electromagnetic wave-absorbing properties, comprising the following steps:

[0066] Step 1. Put Ti 3 AlC 2 The powder is mixed with hydrofluoric acid to obtain a mixed solution A;

[0067] In step 1, every 40mL of hydrofluoric acid needs 10mmol of Ti 3 AlC 2 .

[0068] Step 2. Stir the mixed solution A continuously for 30 hours at room temperature to obtain the mixed solution B;

[0069] In step 2, the stirring speed is 400r / min.

[0070] Step 3. At a rotational speed of 6500r / min, use a centrifuge to repeatedly centrifuge and wash the mixed solution B with deionized water until the pH value of the liquid is 7;

[0071] Step 4, the centrifuged product obtained in step 3 is dried in an oven to obtain Ti 3 C 2 T X ;

[0072] In step 4, the drying temperature is 70° C.; the drying time is 8 hours.

[0073] Step 5, weigh raw materials according to the following molar mass ratio: CoCl 2 ·6H 2 O: FeCl 3...

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Abstract

The invention discloses a preparation method of a composite wave-absorbing agent with electromagnetic wave-absorbing performance. The preparation method comprises the following steps: firstly, etching original phase Ti3AlC2 by using an HF etching agent to prepare two-dimensional layered Ti3C2TX, then introducing CoFe2O4 with high saturation magnetization and high electromagnetic performance, and synthesizing a CoFe2O4 / Ti3C2TX composite material by using a simple and easy-to-control solvothermal method to make CoFe2O4 nanoparticles uniformly coat the surface of the two-dimensional layered Ti3C2TX and be inserted into the interlayer of the Ti3C2TX. According to the method, the CoFe2O4 / Ti3C2TX composite material with good wave-absorbing performance is prepared. The invention discloses the composite wave-absorbing agent with electromagnetic wave absorbing performance.

Description

technical field [0001] The invention belongs to the technical field of electromagnetic wave-absorbing materials, and in particular relates to a composite wave-absorbing agent with electromagnetic wave-absorbing performance, and also relates to a preparation method of the composite wave-absorbing agent with electromagnetic wave-absorbing performance. Background technique [0002] In recent years, due to the rapid development of information technology and electronic equipment, electromagnetic wave pollution that threatens human health has been generated. Therefore, people have devoted themselves to the development of high-performance microwave absorbing materials. At present, ferrite materials are widely used in the field of electromagnetic protection due to their excellent magnetic properties, low cost, good electrical and optical properties, but due to poor impedance matching of a single ferrite, single loss mechanism, high density, etc. The reason is that its absorbing perf...

Claims

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Application Information

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IPC IPC(8): H05K9/00H01Q17/00
CPCH05K9/0073H01Q17/00
Inventor 田娜王楚凯游才印孙永勤
Owner XIAN UNIV OF TECH
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