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Titanium silicon carbide/cobalt ferrite electromagnetic wave absorbent and preparation method

A technology of cobalt ferrite and titanium silicon carbon, which is applied in the field of electromagnetic waves, can solve the problems of complex process, high cost, and unsuitability for industrial production, and achieve the effects of improving absorption effect, strong electromagnetic wave absorption ability, and low cost

Active Publication Date: 2017-08-04
TONGXIANG BEITE TECH CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

It can be seen that from the perspective of the existing technology, the existing methods for preparing ferrite basically need to be calcined at high temperature, which has high cost, complicated process and is not suitable for industrial production.

Method used

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  • Titanium silicon carbide/cobalt ferrite electromagnetic wave absorbent and preparation method

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0060] Take Ti with a particle size of 2 μm to 20 μm and a purity greater than 93%. 3 SiC 2 powder; Ti obtained by using a nitric acid solution with a concentration of 5 3 SiC 2 The powder is pickled, and the pickling time is 10min; the Ti 3 SiC 2 Wash the powder with alcohol, and the alcohol washing time is 10min; use deionized water to wash the Ti 3 SiC 2 The powder was washed twice repeatedly, and finally after centrifugation and filtration, it was dried at 80°C to obtain the pretreated Ti 3 SiC 2 Powder;

[0061] At room temperature, according to CoFe 2 o 4 Weigh the metal salts of Co and Fe, and dissolve them in water respectively to obtain a mixed salt solution with a concentration of 0.04mol / L; add citric acid to the mixed metal salt solution, and stir evenly, and add The molar ratio of the amount of citric acid to the metal ion Co is 4:1 to obtain a precursor solution;

[0062] The preprocessed Ti 3 SiC 2 The powder is added to the precursor solution to ob...

Embodiment 2

[0067] Take Ti with a particle size of 2 μm to 20 μm and a purity greater than 93%. 3 SiC 2 Powder; Ti obtained by using nitric acid solution with a concentration of 10vol% 3 SiC 2 The powder is pickled, and the pickling time is 20min; the Ti 3 SiC 2 Wash the powder with alcohol, and the alcohol washing time is 20min; use deionized water to wash the Ti 3 SiC 2 The powder was repeatedly washed 3 times, and finally after centrifugation and filtration, it was dried at 100°C to obtain the pretreated Ti 3 SiC 2 Powder;

[0068] At room temperature, according to CoFe 2 o 4 Weigh the metal salts of Co and Fe, and dissolve them in water respectively to obtain a mixed salt solution with a concentration of 0.06mol / L; add citric acid to the mixed metal salt solution, and stir evenly, and add The molar ratio of the amount of citric acid to the metal ion Co is 5:1 to obtain a precursor solution;

[0069] The preprocessed Ti 3 SiC 2 The powder is added to the precursor solution...

Embodiment 3

[0074] Take Ti with a particle size of 2 μm to 20 μm and a purity greater than 93%. 3 SiC 2 Powder; Ti obtained by using a nitric acid solution with a concentration of 20vol% 3 SiC 2 The powder is pickled, and the pickling time is 30min; the Ti 3 SiC 2 Wash the powder with alcohol, and the alcohol washing time is 30min; use deionized water to wash the Ti 3 SiC 2 The powder was repeatedly washed 4 times, and finally after centrifugation and filtration, it was dried at 120°C to obtain the pretreated Ti 3 SiC 2 Powder;

[0075] At room temperature, according to CoFe 2 o 4 Weigh the metal salts of Co and Fe, and dissolve them in water respectively to obtain a mixed salt solution with a concentration of 0.1mol / L; add citric acid to the mixed metal salt solution, and stir evenly, and add The molar ratio of the amount of citric acid to the metal ion Co is 6:1 to obtain a precursor solution;

[0076] The preprocessed Ti 3 SiC 2 The powder is added to the precursor solutio...

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Abstract

The invention discloses a titanium silicon carbide / cobalt ferrite electromagnetic wave absorbent. The titanium silicon carbide / cobalt ferrite electromagnetic wave absorbent is formed by compounding Ti3SiC2 with CoFe2O4. The invention also discloses a preparation method of the electromagnetic wave absorbent. The preparation method comprises the following steps: pretreating Ti3SiC2 powder; preparing a precursor solution; preparing titanium silicon carbide / cobalt ferrite precursory sol by using the pretreated Ti3SiC2 powder and the precursor solution; carrying out drying treatment on the titanium silicon carbide / cobalt ferrite precursory sol to obtain silicon carbide / cobalt ferrite precursory xerogel; enabling the silicon carbide / cobalt ferrite precursory xerogel to generate self-propagating combustion reaction, then carrying out cooling treatment, and finally, grinding into powder and obtaining the titanium silicon carbide / cobalt ferrite electromagnetic wave absorbent. The titanium silicon carbide / cobalt ferrite electromagnetic wave absorbent disclosed by the invention has the characteristics of light weight, and dielectric and magnetic loses on electromagnetic waves is existed. The preparation method disclosed by the invention is simple and easy to realize.

Description

technical field [0001] The invention belongs to the technical field of electromagnetic waves, in particular to a titanium silicon carbon / cobalt ferrite (Ti 3 SiC 2 / CoFe 2 o 4 ) electromagnetic wave absorber, the present invention also relates to the preparation method of the above-mentioned titanium silicon carbon / cobalt ferrite electromagnetic wave absorber. Background technique [0002] With the development of modern science and technology and the progress of industrial civilization, the application of various electronic instruments and equipment is also increasing, which produces more and more electromagnetic radiation and electromagnetic interference is becoming more and more serious. At the same time, electromagnetic wave pollution has penetrated into every corner of life, seriously affecting people's physical and mental health. Studies have shown that microwave electromagnetic radiation can cause diseases in the biological matrix, central nervous system, cardiovas...

Claims

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Application Information

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IPC IPC(8): C01G51/00C01B32/90
CPCC01G51/00C01P2004/80C01P2006/40C01P2006/42
Inventor 刘毅苏晓磊徐洁王俊勃贺辛亥屈银虎刘松涛
Owner TONGXIANG BEITE TECH CO LTD
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