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A preparation method of barium ferrite@pani composite wave-absorbing material

A composite wave absorbing material and barium ferrite technology are applied in the field of preparation of barium ferrite@PANI composite wave absorbing material, which can solve the problems of limited electromagnetic absorption performance, and achieve the effect of improving electromagnetic absorption capacity and good impedance matching.

Active Publication Date: 2021-11-02
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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  • A preparation method of barium ferrite@pani composite wave-absorbing material
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  • A preparation method of barium ferrite@pani composite wave-absorbing material

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0030] BAFE 12 O 19 @Pani composite absorbing material preparation method, including the following steps:

[0031] (1) BACO with a total of 25g of the total amount of 25g by mass than BA: Fe = 1: 11.5 3 And Fe 2 O 3 Ball mill, 450R / min, ball milling for 4 h, then dry, 60 mesh sieve to obtain mixed powder A 1 .

[0032] (2) Mixed powder A will be obtained 1 It is mixed with the molten salt by mass than 1: 1, and the second ball mill is mixed, then dry, 60 mesh sieve to obtain a mixed powder B. 1 . Among them, the mixture of the molten salt is KCl and NaCl, the mass ratio of KCl and NaCl is 1: 1.

[0033] (3) The mixed powder B will be obtained 1 Calcined at 1000 ° C for 2 h, then filtered, washed, dried to get BAFE 12 O 19 Precautions.

[0034] (4) use electronic balance title 10g Bacl 2 · 2h 2 O and 5G Fe 2 O 3 , Then add 0.007G BAFE 12 O 19 The precursor was stirred, and the mixed powder was calcined at 1200 ° C in the muffle 8h, filtered, washed, dried to obtain a sheet BAFE 1...

Embodiment 2

[0046] BAFE 12 O 19 @Pani composite absorbing material preparation method, including the following steps:

[0047] (1) Press Moss BA: Fe = 1: 11 Total total amount of 25g Baco 3 And Fe 2 O 3 Ball mill, 450R / min, ball milling for 4 h, then dry, 60 mesh sieve to obtain mixed powder A 1 .

[0048] (2) Mixed powder A will be obtained 1 It is mixed with the molten salt by mass 1: 1, and the second ball mill is mixed, then dry, 60 mesh sieve to obtain a mixed powder B 1 . Among them, the mixture of the molten salt is KCl and NaCl, the mass ratio of KCl and NaCl is 1: 1.

[0049] (3) The mixed powder B will be obtained 1 Calcined at 1000 ° C for 2 h, then filtered, washed, dried to get BAFE 12 O 19 Precautions.

[0050] (4) use electronic balance title 10g Bacl 2 · 2h 2 O and 5G Fe 2 O 3 , Then add 0.007G BAFE 12 O 19 The precursor was stirred, and the mixed powder was calcined at 1200 ° C in the muffle 8h, filtered, washed, dried to obtain a sheet BAFE 12 O 19 Powder.

[0051] (5) Hyd...

Embodiment 3

[0056] BAFE 12 O 19 @Pani composite absorbing material preparation method, including the following steps:

[0057] (1) BACO with a total of 25g of the total amount of 25g by mass than BA: Fe = 1: 11.5 3 And Fe 2 O 3 Ball mill, 450R / min, ball milling for 4 h, then dry, 60 mesh sieve to obtain mixed powder A 1 .

[0058] (2) Mixed powder A will be obtained 1 It is mixed with the molten salt by mass 1: 1, and the second ball mill is mixed, then dry, 60 mesh sieve to obtain a mixed powder B 1 . Among them, the mixture of the molten salt is KCl and NaCl, the mass ratio of KCl and NaCl is 1: 1.

[0059] (3) The mixed powder B will be obtained 1 Calcined at 1000 ° C for 2 h, then filtered, washed, dried to get BAFE 12 O 19 Precautions.

[0060] (4) use electronic balance title 10g Bacl 2 · 2h 2 O and 5G Fe 2 O 3 , Then add 0.007G BAFE 12 O 19 The precursor was stirred, and the mixed powder was calcined at 1200 ° C in the muffle 8h, filtered, washed, dried to obtain a sheet BAFE 12 O 19...

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Abstract

A kind of preparation method of barium ferrite@PANI composite wave-absorbing material, hydrochloric acid and BaFe 12 o 19 After ultrasonication of the powder, stir evenly at -3~-5°C, add aniline, stir evenly, and obtain a mixed solution; dissolve ammonium persulfate in hydrochloric acid, stir evenly, and then add it dropwise to the mixed solution, Stir at ~-5°C for 8-12h, wash and dry to obtain BaFe 12 o 19 @PANI Composite absorbing material, this material is a absorbing material with excellent performance. The invention has the advantages of simple operation and short preparation period, and the prepared wave-absorbing material can achieve a reflection loss of -48.76dB when the thickness is 2.3mm, and a frequency bandwidth below -10dB reaches 3.19GHz.

Description

Technical field [0001] The present invention belongs to the technical field of material preparation, and it is related to the preparation method of ferrous @Pani composite absorbing material. Background technique [0002] With the rapid development of electronic systems and information technology in the Gigabitz of electromagnetic waves, electromagnetic wave pollution has become more serious, and it has a serious impact on people's daily life. In addition, in the modern national defense military field, with the continuous update of various radars, infrared and other advanced detectors and precise guidance weapons, the requirements of weapons and equipment systems such as the aircraft, tanks and missiles in modern operations are also increasing. This makes stealth technology increasingly becoming one of the important components of contemporary electronic warfare. Therefore, it is an urgent application value for people's daily life, electronic communications and national defense mi...

Claims

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Application Information

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Patent Type & Authority Patents(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