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Preparation method for Zr-Mn-Co multi-doped barium ferrite wave-absorbing material

A technology of barium ferrite and wave-absorbing materials, which is applied in the field of preparation of electromagnetic wave-absorbing materials, and can solve problems such as poor dispersion and easy agglomeration of synthetic powders

Inactive Publication Date: 2013-05-08
SHAANXI UNIV OF SCI & TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

However, the powder synthesized by the sol-gel method is easy to agglomerate and has poor dispersion

Method used

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  • Preparation method for Zr-Mn-Co multi-doped barium ferrite wave-absorbing material
  • Preparation method for Zr-Mn-Co multi-doped barium ferrite wave-absorbing material
  • Preparation method for Zr-Mn-Co multi-doped barium ferrite wave-absorbing material

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preparation example Construction

[0018] The preparation method of Zr-Mn-Co multi-component doped barium ferrite wave-absorbing material of the present invention specifically comprises the following steps:

[0019] 1) Choose commercially available Zr(OH) 4 , MnCO 3 、Co 2 o 3 Dissolved in nitric acid solution with a mass fraction of 56-58%, and continuously stirred in a water bath at 60-80°C, it is configured to be made of Zr(NO 3 ) 4 , Mn(NO 3 ) 2 , Co(NO 3 ) 3 To the formed transparent mixed solution A, add deionized water to control the total molar concentration of the three metal ions in the solution A within the range of 0.01-0.1 molar concentration. The Zr(OH) 4 , MnCO 3 、Co 2 o 3 According to the molar ratio of Zr:Mn:Co of 0.625:1:1, the amount of nitric acid is just enough to dissolve Zr(OH) 4 , MnCO 3 、Co 2 o 3 It is appropriate.

[0020] 2) According to MnCO 3 The molar ratio of EDTA to ethylenediaminetetraacetic acid (EDTA) is 1:2~8. Weigh EDTA, add it to solution A, stir well to di...

Embodiment 1

[0027] 1) Choose commercially available Zr(OH) 4 , MnCO 3 、Co 2 o 3 Dissolved in a nitric acid solution with a mass fraction of 56-58%, and continuously stirred in a water bath at 60°C, it is configured to be made of Zr(NO 3 ) 4 , Mn(NO 3 ) 2 , Co(NO 3 ) 3 For the transparent mixed solution A formed, add deionized water to make the total molar concentration of the three metal ions in the solution A controlled within the range of 0.1 molar concentration. The Zr(OH) 4 , MnCO 3 、Co 2 o 3 According to the molar ratio of Zr:Mn:Co of 0.625:1:1, the amount of nitric acid is just enough to dissolve Zr(OH) 4 , MnCO 3 、Co 2 o 3 It is appropriate.

[0028] 2) According to MnCO 3The molar ratio of ethylenediaminetetraacetic acid (EDTA) and ethylenediaminetetraacetic acid (EDTA) is 1:2. Weigh EDTA, add it to solution A, stir it well to dissolve it, and obtain solution B.

[0029] 3) Weigh Ba(NO 3 ) 2 and Fe(NO 3 ) 3 9H 2 O, according to the first Ba(NO 3 ) 2 After ...

Embodiment 2

[0034] 1) Choose commercially available Zr(OH) 4 , MnCO 3 、Co 2 o 3 Dissolved in a nitric acid solution with a mass fraction of 56-58%, and continuously stirred in a water bath at 70°C, it is configured to be made of Zr(NO 3 ) 4 , Mn(NO 3 ) 2 , Co(NO 3 ) 3 Formed transparent mixed solution A, adding deionized water to make the total molar concentration of the three metal ions in solution A controlled within the range of 0.08 molar concentration. The Zr(OH) 4 , MnCO 3 、Co 2 o 3 According to the molar ratio of Zr:Mn:Co of 0.625:1:1, the amount of nitric acid is just enough to dissolve Zr(OH) 4 , MnCO 3 、Co 2 o 3 It is appropriate.

[0035] 2) According to MnCO 3 The molar ratio of ethylenediaminetetraacetic acid (EDTA) and ethylenediaminetetraacetic acid (EDTA) is 1:4. Weigh EDTA, add it to solution A, stir well to dissolve it, and obtain solution B.

[0036] 3) Weigh Ba(NO 3 ) 2 and Fe(NO 3 ) 3 9H 2 O, according to the first Ba(NO 3 ) 2 After Fe(NO 3 )...

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Abstract

The invention provides a preparation method for a Zr-Mn-Co multi-doped barium ferrite wave-absorbing material. The preparation method comprises the following steps of: preparing a mixed solution A containing Zr, Mn and Co; adjusting the total molar concentration of the metal ions in the mixed solution A to be 0.01mol / L-0.1mol / L; adding ethylenediamine tetraacetic acid to the mixed solution A to form a solution B; adding a barium source and an iron source to the solution B to form a solution C; adjusting the pH value of the solution C to 8-9 to form uniform and stable transparent sol; preparing the sol into dry sol; carrying out hydrothermal reaction on the dry sol in a water-heating kettle; centrifugally washing the product; and sintering the centrifugally washed materials in a muffle furnace. According to the preparation method provided by the invention, an inorganic salt is used as a precursor, and EDTA (Ethylene Diamine Tetraacetic Acid) is used as a complexing agent to prepare the Zr-Mn-Co multi-doped barium ferrite, so that the crystal morphology and dimension of the barium ferrite are adjusted, thereby providing a novel way for researching the novel water-absorbing agent in stealth materials.

Description

technical field [0001] The invention relates to a preparation method of an electromagnetic wave absorbing material. In particular, it relates to a method for preparing an M-type Zr-Mn-Co multi-component doped barium ferrite wave-absorbing material by a hydrothermal assisted sol-gel method. Background technique [0002] Magnetoplumbite barium ferrite (BaFe 12 o 19 ) is a typical P63 / mmc space structure, due to its excellent physical and chemical properties, such as high saturation magnetization, large coercive force, good chemical stability and corrosion resistance, etc., Therefore, it is widely used in permanent magnet, magnetic recording and microwave devices. [0003] Ferrite absorbing agent has excellent absorbing performance and low price, which has been valued by various countries, and it is still one of the main components of radar absorbing materials. A lot of research has been done on ferrite absorbers in China. However, when ferrite is used as a wave absorbing ...

Claims

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Application Information

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IPC IPC(8): C04B35/26C04B35/622
Inventor 史永胜乔畅君宁青菊李向龙高丹鹏于成龙
Owner SHAANXI UNIV OF SCI & TECH
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