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Fe2O3@MXene composite powder and preparation method thereof

A composite powder, fe2o3 technology, applied in the field of wave-absorbing materials, can solve problems such as poor high temperature resistance, high reflection loss, and narrow absorption frequency band, and achieve the effects of low preparation cost, improved wave-absorbing ability, and short production cycle

Pending Publication Date: 2019-12-20
SHAANXI UNIV OF SCI & TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Ferrite materials also inevitably have disadvantages, such as high density, narrow absorption frequency band, and poor high temperature resistance
Its magnetic permeability is low, and there is no reflection of wave absorption performance at (8~15) GHz. It has the highest reflection loss at 17 GHz, which is approximately -35dB

Method used

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  • Fe2O3@MXene composite powder and preparation method thereof
  • Fe2O3@MXene composite powder and preparation method thereof
  • Fe2O3@MXene composite powder and preparation method thereof

Examples

Experimental program
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preparation example Construction

[0044] A kind of Fe provided by the invention 2 o 3 The preparation method of @MXene composite powder comprises the following steps:

[0045] Step 1, the Fe 2 o 3 Mix with MXene powder at a molar ratio of (1~3):1, and stir at room temperature for 0.5h to make Fe 2 o 3 Mix well with MXene powder;

[0046] Step 2, the mixed composite material is placed at room temperature and dried to constant weight to obtain Fe 2 o 3 @MXene composite powder.

[0047] Wherein, the preparation of MXene powder comprises the following steps:

[0048] S1, weigh 3g of titanium aluminum carbon with an electronic balance, slowly add it to 60ml of hydrofluoric acid with a concentration of 40%, place it on a magnetic stirrer, and stir at a constant temperature of 35°C for 24h;

[0049] S2, ultrasonic cleaning the stirred mixed solution at 35°C for 60 minutes;

[0050] S3, then the ultrasonically cleaned mixed solution was centrifuged four times with deionized water until the pH was neutral, an...

Embodiment 1

[0065] direct mixing

[0066] 1. Preparation of MXene powder

[0067] (a) Weigh 3g of titanium aluminum carbon with an electronic balance, slowly add it to 60ml of hydrofluoric acid with a concentration of 40%, place it on a magnetic stirrer, and stir at a constant temperature of 35°C for 24h;

[0068] (b) Ultrasonic cleaning the stirred mixed solution for 60 min at 35°C;

[0069] (c) Then the ultrasonically cleaned mixed solution was centrifuged four times with deionized water until the pH was close to neutral, and then dried at room temperature to obtain MXene powder;

[0070] 2. Preparation of Fe2O3 powder

[0071] (a) Weigh 60g deionized water and 32g absolute ethanol respectively with an electronic balance, and mix the two as solvent;

[0072] (b) Then weigh 21.014g of citric acid and 40.4g of ferric nitrate and add them into the solvent, place them on a magnetic stirrer and stir to dissolve to configure the precursor, and stir at a constant temperature of 85°C until w...

Embodiment 2

[0077] one-step solvothermal method

[0078] 1. Preparation of MXene powder;

[0079] (a) Weigh 3g of titanium aluminum carbon with an electronic balance, slowly add it to 60ml of hydrofluoric acid with a concentration of 40%, place it on a magnetic stirrer, and stir at a constant temperature of 35°C for 24h;

[0080] (b) Ultrasonic cleaning the stirred mixed solution for 60 min at 35°C;

[0081] (c) Then, the ultrasonically cleaned mixed solution was centrifuged four times with deionized water until the pH was neutral, and then dried at room temperature to obtain MXene powder;

[0082] 2. Weigh 0.168g (1mmol) MXene powder with an electronic balance and add it to 60ml DMF (N,N-dimethylformamide, analytically pure), ultrasonically wash for 2 hours to obtain MXene dispersion, and prepare 3 dispersions of the same composition ;

[0083] 3. Weigh 0.404g (1mmol), 0.808g (2mmol), and 1.212g (3mmol) of Fe(NO3)3 9H2O respectively with an electronic balance, add them to the dispersi...

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Abstract

The invention provides Fe2O3@MXene composite powder and a preparation method thereof. The preparation method of the Fe2O3@MXene composite powder comprises the following steps that step one, Fe2O3 is mixed with MXene powder with the molar ratio of (1-3) to 1, and a mixture is stirred thermostatically at room temperature to intensive mixing; and step two, a mixed composite material is placed under the room temperature condition for drying to constant weight, and the Fe2O3@MXene composite powder is obtained; the Fe2O3 is mixed with the MXene powder, more Fe2O3 nano-particles are attached to layered edges of the MXene composite powder, the particle sizes of the Fe2O3 nano-particles are uniform and no agglomeration phenomenon generates, and the uniformity of interlayer spacing of the MXene powder is better; the Fe2O3 nano-particles are doped in the MXene powder, so that a real part Epsilon' and an imaginary part Epsilon'' of a dielectric constant are reduced, a real part Mu' and an imaginary part Mu'' of the magnetic conductivity are risen, and a loss tangent value tan Delta is risen; and the composite material of the Fe2O3 nano-particles are doped in the MXene powder, so that the reflectivity loss is reduced, the largest absorption peak can move to low frequency, and it means that the wave-absorbing capacity is improved. The preparation method of the Fe2O3@MXene composite powder islow in cost, short in production period and environmentally friendly.

Description

technical field [0001] The invention relates to the field of wave-absorbing materials, in particular to a Fe 2 o 3 @MXene composite powder and its preparation method. Background technique [0002] As an important absorber of electromagnetic waves, ferrite material is a double-composite dielectric material, which has both magnetic and dielectric properties, so it has good wave-absorbing characteristics, low cost, and small size. Wave material, in terms of impedance matching, it not only has magnetic absorption but also electric absorption for electromagnetic waves; in terms of attenuation matching, magnetic loss and electrical loss are also the sources of electromagnetic wave loss, and the combination of the two can make electromagnetic waves obtain maximum absorption and loss. Ferrite materials also inevitably have disadvantages, such as high density, narrow absorption frequency band, and poor high temperature resistance. [0003] Fe 2 o 3 As one of the most stable fer...

Claims

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Application Information

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IPC IPC(8): C09K3/00H05K9/00
CPCC09K3/00H05K9/0081
Inventor 苏进步赵霞霖王成兵凌三李政通李威杨金柱王九龙
Owner SHAANXI UNIV OF SCI & TECH
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