Preparation method of iron/iron carbide-loaded porous carbon sphere composite wave-absorbing material

A composite wave-absorbing material and porous carbon technology, applied in chemical instruments and methods, and other chemical processes, can solve the problems of complex process, low output, high cost, etc., and achieve the effect of simple process, uniform particle size distribution, and convenient operation

Inactive Publication Date: 2016-08-10
XI'AN INST OF OPTICS & FINE MECHANICS - CHINESE ACAD OF SCI
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  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0009] In order to solve the technical problems of low output, high cost and complex process in the existing preparation method of composite absorbing materials, the present invention provides a porous carbon loaded with iron and iron carbide with simple process, convenient operation and low requirements on production equipment Preparation method of spherical composite wave-absorbing material

Method used

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  • Preparation method of iron/iron carbide-loaded porous carbon sphere composite wave-absorbing material
  • Preparation method of iron/iron carbide-loaded porous carbon sphere composite wave-absorbing material
  • Preparation method of iron/iron carbide-loaded porous carbon sphere composite wave-absorbing material

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Experimental program
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Embodiment 1

[0037] (1) Put the porous carbon spheres with a particle size distribution of 0.5-1mm in a nitric acid solution with a mass fraction of 40-50%, the mass of the carbon spheres to the nitric acid volume ratio is 1g: 15-20ml, and then at 40-50 ℃ Stir and immerse for 10-12 hours in a water bath, repeatedly wash with deionized water until neutral, and then dry in an oven at 100-110 °C for 12-24 hours;

[0038] (2) get the iron salt and dissolve it in deionized water to obtain the precursor solution, and the volume ratio of the mass of the iron salt to the deionized water is 4-16g: 10-40ml;

[0039] (3) immersing the porous carbon spheres in the above-mentioned precursor solution, stirring and immersing for 12-24 hours, and the volume ratio of the mass of the carbon spheres to the precursor solution is 1-3g: 9-20ml;

[0040] (4) filter out the porous carbon ball from the solution, wash with 10-40ml deionized water, and filter;

[0041] (5) putting the porous carbon balls obtained i...

Embodiment 2

[0045] (1) The porous carbon spheres with a particle size distribution of 1-2mm are placed in a nitric acid solution with a mass fraction of 40-60%. Stir and immerse for 10-12 hours in a water bath, repeatedly wash with deionized water until neutral, and then dry in an oven at 100-110 °C for 12-24 hours;

[0046] (2) get the iron salt and dissolve it in deionized water to obtain the precursor solution, and the volume ratio of the mass of the iron salt to the deionized water is 4-16g: 10-40ml;

[0047] (3) immersing the porous carbon spheres in the above-mentioned precursor solution, stirring and immersing for 12-24 hours, and the volume ratio of the mass of the carbon spheres to the precursor solution is 1-3g: 9-20ml;

[0048] (4) filter out the porous carbon ball from the solution, wash with 10-40ml deionized water, and filter;

[0049] (5) The porous carbon spheres obtained in (4) are placed and washed to neutrality, and then dried in an oven at 100-110° C. for 12-24 hours;...

Embodiment 3

[0055] (1) The porous carbon spheres with a particle size distribution of 0.5-2mm are placed in a nitric acid solution with a mass fraction of 40-60%. Stir and immerse for 10-12 hours in a water bath, repeatedly wash with deionized water until neutral, and then dry in an oven at 100-110 °C for 12-24 hours;

[0056] (2) get the iron salt and dissolve it in deionized water to obtain the precursor solution, and the volume ratio of the mass of the iron salt to the deionized water is 4-16g: 10-40ml;

[0057] (3) immersing the porous carbon spheres in the above-mentioned precursor solution, stirring and immersing for 12-24 hours, and the volume ratio of the mass of the carbon spheres to the precursor solution is 1-3g: 9-20ml;

[0058] (4) filter out the porous carbon ball from the solution, wash with 10-40ml deionized water, and filter;

[0059] (5) putting the porous carbon balls obtained in (4) into an oven at 60-80° C. for drying for 12-20h;

[0060] (6) placing the dried porou...

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Abstract

The invention relates to a preparation method of an iron/iron carbide-loaded porous carbon sphere composite wave-absorbing material. The method comprises the following steps: 1) preparing an iron-salt-containing precursor solution; 2) stirring porous carbon spheres in the precursor solution for impregnation; 3) filtering out the porous carbon spheres, washing and drying; 4) calcining the dried porous carbon spheres in an inert atmosphere; and 5) cooling to room temperature in an inert atmosphere to obtain the iron/iron carbide-loaded porous carbon sphere composite wave-absorbing material. The iron salt precursor solution is introduced to the inside of the ducts of the carbon spheres by using the high specific area and strong adsorptivity of the porous carbon spheres through the capillary actions and is combined with the hydrophilic oxygen-containing functional group; and finally, the drying and sintering treatment in the inert atmosphere are performed to obtain the simple substance iron/iron carbide-loaded porous carbon sphere composite material. The whole preparation process is simple in technique and convenient to operate, and has low requirements for the production equipment.

Description

technical field [0001] The invention relates to a preparation method of a composite wave absorbing material, in particular to a preparation method of a porous carbon ball composite radar wave absorbing material loaded with metallic elemental iron and iron carbide. Background technique [0002] With the intensification of electronic warfare in modern warfare and the acceleration of the informatization process, the development of absorbing materials is developing in the direction of high performance. Judging from the current research results on absorbing materials, composite technology has become the preferred method to realize the design concept of "thin, light, wide and strong" for new radar absorbing materials. Silicon fibers, carbon nanotubes, carbon black, conductive polymers and carbon fibers, etc.) are compounded with traditional magnetic materials (such as magnetic metal powders and ferrites, etc.) mainly based on magnetic loss. On the one hand, the density of the abo...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C09K3/00C01B31/02B01J27/22
CPCC09K3/00B01J27/22C01P2002/72C01P2002/80
Inventor 徐耀王浩静王红飞
Owner XI'AN INST OF OPTICS & FINE MECHANICS - CHINESE ACAD OF SCI
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