Magnetic iron-based graphite intercalation compound and preparation method thereof

A graphite intercalation and compound technology, applied in the manufacture of inductors/transformers/magnets, the magnetism of inorganic materials, electrical components, etc., can solve the problems of unsatisfactory electromagnetic shielding, complicated operation, and no magnetism, so as to avoid loss of magnetism, method Simple and efficient, good stability and weather resistance

Inactive Publication Date: 2014-02-12
NANJING INST OF TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Comprehensive literature, preparation of FeCl by molten salt method 3 -GIC needs to be sealed in a glass reactor and reacted under anhydrous and oxygen-free conditions. These operations are complicated and difficult to operate in the actual application process
[0007] FeCl 3 -GIC has high conductivity, but is not magnetic, which is not ideal from the perspective of electromagnetic shielding

Method used

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  • Magnetic iron-based graphite intercalation compound and preparation method thereof
  • Magnetic iron-based graphite intercalation compound and preparation method thereof
  • Magnetic iron-based graphite intercalation compound and preparation method thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0036] Soak 10g of 4-6μm colloidal graphite with 6mol / L nitric acid for 12 hours, filter and wash with deionized water, dry and mix with 10g FeCl 3 .6H 2 O mixed (mass ratio iron / graphite = 1 / 1), add an appropriate amount of water and stir to obtain a paste mixture, dry it at 80°C for 10 hours, grind it, heat it to 300°C in a nitrogen atmosphere, keep it for 10 hours, cool it out and use it for 5 % hydrochloric acid solution, washed in a water bath, filtered, washed with deionized water, and dried in H 2 Heating to 320°C in an air atmosphere, keeping the temperature for 10 hours, cooling and taking out the obtained product, wherein the metallic iron content is 17%.

[0037] The obtained product is added into an acrylic resin solution to disperse evenly, and is screen-printed into a ring shape, and its electromagnetic shielding effectiveness is tested in the range of 1MHz-2GHz to reach 30-50dB.

Embodiment 2

[0039] Soak 10g of 4-6μm colloidal graphite with 1mol / L sodium hypochlorite for 18 hours, filter and wash with deionized water, dry and mix with 1g FeCl 3 .6H 2 O mixed (mass ratio iron / graphite = 1 / 10), add an appropriate amount of water and stir to obtain a paste mixture, dry it at 100°C for 9 hours, grind it, heat it to 300°C in an argon atmosphere, keep it warm for 2 hours, and then raise the temperature to 400°C. Keep it warm for 3 hours, take it out after cooling, wash and filter it with a 5% hydrochloric acid solution in a water bath, wash it with deionized water, heat it to 600°C in a CO atmosphere after drying, keep it warm for 0.5 hours, take it out after cooling, and take out the obtained product, in which the metal iron content is 2%.

[0040] The obtained product is added to an acrylic resin solution to disperse evenly, and is screen-printed into a ring shape, and its electromagnetic shielding effectiveness is tested in the range of 1MHz-2GHz to reach 32-48dB.

Embodiment 3

[0042] Soak 10g of 4-6μm colloidal graphite with 1mol / L perchloric acid for 1 hour, filter and wash with deionized water, dry and mix with 20g FeCl 3 .6H 2 O mixed (mass ratio iron / graphite = 1 / 0.5), add an appropriate amount of water and stir to obtain a paste mixture, dry it at 110°C for 7 hours, grind it, heat it to 300°C in a helium atmosphere, keep it warm for 1 hour, and heat up to 450°C. Insulate for 2 hours, take it out after cooling, wash and filter with 5% hydrochloric acid solution in a water bath, wash with deionized water, and dry in NH 3 Heating to 350°C in an air atmosphere, keeping the temperature for 8 hours, cooling and taking out the obtained product, wherein the metallic iron content is 29%.

[0043] The obtained product is added to an acrylic resin solution to disperse evenly, and is screen-printed into a ring shape, and its electromagnetic shielding effectiveness is tested in the range of 1MHz-2GHz to reach 30-46dB.

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Abstract

The invention relates to a magnetic iron-based graphite intercalation compound and a preparation method thereof. The magnetic iron-based graphite intercalation compound is prepared from graphite micro powder through pre-oxidation, mixing of the graphite micro powder and ferric chloride, drying, intercalation, acid washing and reduction. According to the magnetic iron-based graphite intercalation compound and the preparation method thereof, used raw materials are easy to obtain, the method is simple and efficient, an obtained product has the good magnetic conductivity of iron-based magnetic materials and good electrical conductivity of graphite-based materials, excellent stability of the iron-based intercalation compound is achieved through the intercalation structure, and the magnetic iron-based graphite intercalation compound has good application prospect in the fields such as electromagnetic shielding, intelligent guided missile packaging materials, infrared absorption materials, and electrical conductive slurry due to all the characteristics of the magnetic iron-based graphite intercalation compound.

Description

technical field [0001] The invention relates to a magnetic iron-based graphite intercalation compound and a preparation method thereof. The material is prepared from graphite micropowder through pre-oxidation, ferric chloride mixing, drying, intercalation, pickling and reduction, and belongs to electromagnetic materials field. Background technique [0002] Electromagnetic shielding can reduce the electromagnetic radiation intensity of electronic appliances and reduce electromagnetic radiation pollution. At the same time, it can also prevent electronic appliances from being interfered by external electronics and prevent electronic appliances from malfunctioning due to interference; commonly used electromagnetic shielding materials include metal plates, metal meshes, and shielding. Fabrics and barrier coatings, etc. According to the principle of electromagnetic shielding, if only high-conductivity metal is used as the shielding material, the shielding is mainly the contributi...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H01F1/01H01F41/02
Inventor 谭学锋黄玉安张可强陈汉东杭祖圣王润俊石宇豪
Owner NANJING INST OF TECH
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