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Method for preparing porous carbon ball composite absorbing material loaded with magnetic metal element

A composite wave absorbing material and magnetic metal technology, applied in electrical components, antennas and other directions, can solve the problems of high cost, complex process, low output, etc., and achieve the effects of convenient operation, simple process and uniform particle size distribution

Inactive Publication Date: 2016-08-24
XI'AN INST OF OPTICS & FINE MECHANICS - CHINESE ACAD OF SCI
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  • Summary
  • 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 wave-absorbing materials, the present invention provides a porous carbon sphere loaded with magnetic metal element with simple process, convenient operation and low requirements on production equipment Preparation method of composite wave-absorbing material

Method used

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  • Method for preparing porous carbon ball composite absorbing material loaded with magnetic metal element
  • Method for preparing porous carbon ball composite absorbing material loaded with magnetic metal element
  • Method for preparing porous carbon ball composite absorbing material loaded with magnetic metal element

Examples

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Effect test

Embodiment 1

[0039] (1) Put porous carbon spheres with a particle size distribution of 0.5-2mm in a nitric acid solution with a mass fraction of 40-60%, the mass of carbon spheres to the volume ratio of nitric acid is 1g: 15-30ml, and then Stir and impregnate in a water bath for 10-12 hours, wash with deionized water repeatedly until neutral, then dry in an oven at 100-110°C for 12-24 hours;

[0040] (2) Take cobalt salt and dissolve it in deionized water to prepare a precursor solution. The mass of cobalt salt and the volume ratio of deionized water are 2-6g: 10-30ml;

[0041] (3) Dip the porous carbon spheres into the above-mentioned precursor solution respectively, stir and impregnate for 12-24 hours, the volume ratio of the mass of the carbon spheres to the precursor solution is 1-3g: 9-20ml;

[0042] (4) The porous carbon spheres are filtered out from the solution, washed with 10-40ml deionized water, and filtered;

[0043] (5) Put the porous carbon spheres obtained in (4) into an ov...

Embodiment 2

[0047] (1) Put porous carbon spheres with a particle size distribution of 0.5-2mm in a nitric acid solution with a mass fraction of 40-60%, the mass of carbon spheres to the volume ratio of nitric acid is 1g: 15-30ml, and then Stir and impregnate in a water bath for 10-12 hours, wash with deionized water repeatedly until neutral, then dry in an oven at 100-110°C for 12-24 hours;

[0048] (2) Take nickel salt and dissolve it in deionized water respectively to prepare a precursor solution. The mass ratio of nickel salt to deionized water is 2-6g: 10-30ml;

[0049] (3) Dip the porous carbon spheres into the above-mentioned precursor solution respectively, stir and impregnate for 12-24 hours, the volume ratio of the mass of the carbon spheres to the precursor solution is 1-3g: 9-20ml;

[0050] (4) The porous carbon spheres are filtered out from the solution, washed with 10-40ml deionized water, and filtered;

[0051] (5) Put the porous carbon spheres obtained in (4) into an oven ...

Embodiment 3

[0055] (1) Put porous carbon spheres with a particle size distribution of 0.5-2mm in a nitric acid solution with a mass fraction of 40-60%, the mass of carbon spheres to the volume ratio of nitric acid is 1g: 15-30ml, and then Stir and impregnate in a water bath for 10-12 hours, wash with deionized water repeatedly until neutral, then dry in an oven at 100-110°C for 12-24 hours;

[0056] (2) Take cobalt salt and dissolve it in deionized water to prepare a precursor solution. The mass of cobalt salt and the volume ratio of deionized water are 2-6g: 10-30ml;

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

[0058] (4) The porous carbon spheres are filtered out from the solution, washed with 10-40ml deionized water, and filtered;

[0059] (5) Put the porous carbon spheres obtained in (4) into an ov...

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Abstract

The invention relates to a method for preparing a porous carbon ball composite absorbing material loaded with a magnetic metal element. The method includes the steps of 1] preparing a precursor solution containing magnetic metal ion salt; 2] placing porous carbon balls into the precursor solution for stirring and dipping; 3] filtering, then washing and drying the porous carbon balls; 4] calcining the dried porous carbon balls in an inert atmosphere; and 5] cooling to room temperature in the inert atmosphere and then obtaining a porous carbon ball composite absorbing material loaded with a magnetic metal element. The invention makes use of the high specific surface area and the strong adsorption of the porous carbon balls, introduces the precursor solution containing magnetic metal ion salt including cobalt salt, nickel salt and the like into channels of the carbon balls by capillary action, combines with hydrophilic oxygen-containing functional groups, and obtains the porous carbon ball composite absorbing material loaded with the magnetic metal element like cobalt or nickel through drying and sintering in the inert atmosphere. The whole preparation process is simple in technique, convenient to operate, and less demanding on 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 sphere composite radar wave-absorbing material loaded with a magnetic metal element. Background technique [0002] With the intensification of electronic warfare in modern warfare and the acceleration of informatization, the development of microwave-absorbing materials is moving 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 combined with traditional magnetic materials (such as magnetic metal micropowder and ferrite, etc.) with magnetic loss as the mainstay. On the one hand, the above-mentioned electric loss a...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H01Q17/00
CPCH01Q17/00
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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