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Preparation method of barium ferrite@PANI composite wave absorbing material

A composite wave absorbing material and barium ferrite technology, applied in the field of preparation of barium ferrite@PANI composite wave absorbing material, can solve the problems of limited electromagnetic absorption performance, and achieve improved electromagnetic absorption capacity, good impedance matching, and low density. Effect

Active Publication Date: 2018-12-18
SHAANXI UNIV OF SCI & TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

A single magnetic material such as BaFe 12 o 19 The electromagnetic absorption performance in the frequency range of 2 ~ 18GHz is very limited

Method used

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  • Preparation method of barium ferrite@PANI composite wave absorbing material
  • Preparation method of barium ferrite@PANI composite wave absorbing material
  • Preparation method of barium ferrite@PANI composite wave absorbing material

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0030] a BaFe 12 o 19 The preparation method of @PANI composite wave-absorbing material comprises the following steps:

[0031] (1) Weigh a total of 25g of BaCO according to the molar ratio Ba:Fe=1:11.5 3 and Fe 2 o 3 Carry out ball milling, 450r / min, ball milling 4h, then dry, pass through 60 mesh sieves, obtain mixed powder A 1 .

[0032] (2) The obtained mixed powder A 1 Mix with molten salt at a mass ratio of 1:1, 450r / min, ball mill for 12h, perform ball milling and mixing for the second time, then dry and pass through a 60-mesh sieve to obtain mixed powder B 1 . Wherein, the molten salt is a mixture of KCl and NaCl, and the mass ratio of KCl and NaCl is 1:1.

[0033] (3) The obtained mixed powder B 1 Calcined at 1000°C for 2h, then suction filtered, washed and dried to obtain BaFe 12 o 19 Precursor powder.

[0034] (4) Weigh 10g of BaCl with an electronic balance 2 2H 2 O and 5g Fe 2 o 3 , and then add 0.007g of BaFe 12 o 19 The precursor powder is stir...

Embodiment 2

[0046] a BaFe 12 o 19 The preparation method of @PANI composite wave-absorbing material comprises the following steps:

[0047] (1) Weigh a total of 25g of BaCO according to the molar ratio Ba:Fe=1:11 3 and Fe 2 o 3 Carry out ball milling, 450r / min, ball milling 4h, then dry, pass through 60 mesh sieves, obtain mixed powder A 1 .

[0048] (2) The obtained mixed powder A 1 Mix with molten salt at a mass ratio of 1:1, 450r / min, ball mill for 12h, perform ball milling and mixing for the second time, then dry and pass through a 60-mesh sieve to obtain mixed powder B 1 . Wherein, the molten salt is a mixture of KCl and NaCl, and the mass ratio of KCl and NaCl is 1:1.

[0049] (3) The obtained mixed powder B 1 Calcined at 1000°C for 2h, then suction filtered, washed and dried to obtain BaFe 12 o 19 Precursor powder.

[0050] (4) Weigh 10g of BaCl with an electronic balance 2 2H 2 O and 5g Fe 2 o 3 , and then add 0.007g of BaFe 12 o 19 The precursor powder is stirre...

Embodiment 3

[0056] a BaFe 12 o 19 The preparation method of @PANI composite wave-absorbing material comprises the following steps:

[0057] (1) Weigh a total of 25g of BaCO according to the molar ratio Ba:Fe=1:11.5 3 and Fe 2 o 3 Carry out ball milling, 450r / min, ball milling 4h, then dry, pass through 60 mesh sieves, obtain mixed powder A 1 .

[0058] (2) The obtained mixed powder A 1 Mix with molten salt at a mass ratio of 1:1, 450r / min, ball mill for 12h, perform ball milling and mixing for the second time, then dry and pass through a 60-mesh sieve to obtain mixed powder B 1 . Wherein, the molten salt is a mixture of KCl and NaCl, and the mass ratio of KCl and NaCl is 1:1.

[0059] (3) The obtained mixed powder B 1 Calcined at 1000°C for 2h, then suction filtered, washed and dried to obtain BaFe 12 o 19 Precursor powder.

[0060] (4) Weigh 10g of BaCl with an electronic balance 2 2H 2 O and 5g Fe 2 o 3 , and then add 0.007g of BaFe 12 o 19 The precursor powder is stir...

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Abstract

The invention discloses a preparation method of a barium ferrite@PANI composite wave absorbing material. The preparation method comprises: ultrasonically treating hydrochloric acid and BaFe12O19 powder, carrying out uniform stirring at -3 to -5 DEG C, adding aniline into the mixture, carrying out uniform stirring to obtain a mixed solution, dissolving ammonium persulfate in hydrochloric acid, carrying out uniform stirring, adding the mixture into the mixed solution drop by drop, carrying out stirring at -3 to -5 DEG C for 8-12h and carrying out washing and drying to obtain the barium ferrite@PANI composite wave absorbing material. The preparation method is easy to operate and has a short preparation period. The barium ferrite@PANI composite wave absorbing material has a reflection loss of-48.76 dB at the thickness of 2.3mm and bandwidth of 3.19 GHz below -10 dB.

Description

technical field [0001] The invention belongs to the technical field of materials preparation, and relates to a preparation method of barium ferrite@PANI composite wave-absorbing material. Background technique [0002] With the rapid development of electronic systems and information technology in the gigahertz range of electromagnetic waves, electromagnetic wave pollution is becoming more and more serious, which has a serious impact on people's daily life. In addition, in the field of modern national defense and military affairs, with the continuous updating of various radar, infrared and other advanced detectors and precision-guided weapons, the requirements for modern combat aircraft, tanks and missiles and other weaponry systems are also getting higher and higher. This makes stealth technology increasingly become one of the important components of contemporary electronic warfare. Therefore, it is urgent to study the application value of new wave-absorbing materials in peo...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C08L79/02C08K3/24
CPCC08K3/24C08L79/02
Inventor 林营刘怡冉杨海波张苗
Owner SHAANXI UNIV OF SCI & TECH