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Method for preparing cobalt-nickel ferrite/graphene magnetic nanocomposite powder by alcohol thermal method

A cobalt-nickel ferrite and magnetic nanotechnology, which is applied in the field of preparation of cobalt-nickel ferrite/graphene magnetic nanocomposite powder by alcohol thermal method, which achieves the effect of good dispersion, good application prospect and not easy to agglomerate

Inactive Publication Date: 2011-12-14
DONGHUA UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

At present, there is no preparation of cobalt-nickel ferrite (Co 1-x Ni x Fe 2 o 4 ) / graphene magnetic nanocomposite powder

Method used

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  • Method for preparing cobalt-nickel ferrite/graphene magnetic nanocomposite powder by alcohol thermal method
  • Method for preparing cobalt-nickel ferrite/graphene magnetic nanocomposite powder by alcohol thermal method
  • Method for preparing cobalt-nickel ferrite/graphene magnetic nanocomposite powder by alcohol thermal method

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0027] Weigh 55mg of graphite oxide, put it into a 50ml beaker, add 25ml of ethylene glycol, stir evenly with a glass rod, and then stir for 30min with an ultrasonic stirring power of 200W. Weigh 15.4mg cobalt nitrate hexahydrate, 3.85mg nickel nitrate hexahydrate, 35.8mg ferric chloride hexahydrate, put them into a 50ml beaker, add 25ml ethylene glycol, then add 146mg anhydrous sodium acetate, 1ml polyethylene glycol Diol 200, add magnets, magnetically stir at 300 rpm and stir for 40mim. After complete dissolution, mix the graphite oxide solution and the metal salt solution and continue magnetic stirring at 300 rpm for 40 min. After mixing evenly, the above reaction solution was poured into a reaction kettle, and the temperature was raised to 200° C., and reacted for 12 hours. After the reaction, the product was collected with a magnet, washed with deionized water and absolute ethanol, and then dried at 60 ° C for 12 h to obtain cobalt nickel ferrite (Co 1-x Ni x Fe 2 o ...

Embodiment 2

[0029] Weigh 55mg of graphite oxide, put it into a 50ml beaker, add 18ml of ethylene glycol, stir evenly with a glass rod, and then stir with an ultrasonic stirring power of 200W for 60min. Weigh 77.0mg cobalt nitrate hexahydrate, 19.2mg nickel nitrate hexahydrate, 179mg ferric chloride hexahydrate, add to a 50ml beaker, add 18ml ethylene glycol, then add 810mg anhydrous sodium acetate, 1ml polyethylene glycol 400, Add magnetic sub, magnetic stirring 400 rev / min stirring 40mim. After complete dissolution, mix the graphite oxide solution and the metal salt solution and continue magnetic stirring at 400 rpm for 40 min. After mixing evenly, the above reaction solution was poured into a reaction kettle, and the temperature was raised to 220° C., and reacted for 8 hours. After the reaction, the product was collected with a magnet, washed with deionized water and absolute ethanol, and then dried at 60 ° C for 24 h to obtain cobalt nickel ferrite (Co 1-x Ni x Fe 2 o 4 )(0 figure...

Embodiment 3

[0031] Weigh 55mg of graphite oxide, put it into a 50ml beaker, add 36ml of ethylene glycol, stir evenly with a glass rod, and then stir with an ultrasonic stirring power of 300W for 60min. Weigh 38.5mg cobalt nitrate hexahydrate, 57.7mg nickel nitrate hexahydrate, 179mg ferric chloride hexahydrate, put them into a 50ml beaker, add 36ml ethylene glycol, then add 1.1g anhydrous sodium acetate, 0.6ml polyethylene glycol Alcohol 600, add magnets, magnetically stir at 500 rpm and stir for 30mim. After complete dissolution, mix the graphite oxide solution and the metal salt solution and continue magnetic stirring at 500 rpm for 30 min. After mixing evenly, the above reaction solution was poured into the reaction kettle, and the temperature was raised to 180° C., and reacted for 16 hours. After the reaction, the product was collected with a magnet, washed with deionized water and absolute ethanol, and then dried at 70 ° C for 18 h to obtain cobalt nickel ferrite (Co 1-x Ni x Fe ...

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Abstract

The invention relates to a method for preparing cobalt-nickel ferrite / graphene magnetic nanocomposite powder by alcohol thermal method, comprising: (1) dispersing graphite oxide and metal salt into ethylene glycol solution respectively at room temperature, and waiting After dissolving, add polyethylene glycol and anhydrous sodium acetate to the metal salt solution, stir and mix the graphite oxide solution and the metal salt solution to form a reaction solution; (2) Pour the above reaction solution into the reaction kettle and heat up to 180-220 °C, react for 8-16 hours; after the reaction, cool to room temperature, collect the product with a magnet, wash with deionized water and absolute ethanol, and dry to obtain the product. The invention has simple process, low requirements on production equipment, and is easy for industrialized production; the prepared cobalt-nickel ferrite / graphene magnetic nanocomposite powder is well compounded with graphene, and has good dispersibility on the surface and layer of graphene, and the composite powder The volume resistivity is small, the magnetization intensity is high, and it has a good application prospect.

Description

technical field [0001] The invention belongs to the field of preparation of ferrite / graphene magnetic nanocomposite powder, in particular to a method for preparing cobalt-nickel ferrite / graphene magnetic nanocomposite powder by an alcohol-thermal method. Background technique [0002] Ferrite is a magnetic material composed of several oxides with ferric ions as the main positive ion component. The earliest ferrite discovered is magnetite, which shows strong magnetism. It is a new subject of current materials research to improve the optical, electrical and magnetic properties of ferrite and to explore new materials by ion substitution and other methods. At present, scholars at home and abroad control the composition of ferrite materials through doping and other methods, and obtain ferrite materials with different characteristics to meet different application requirements, laying the foundation for the study of new ferrite materials with extraordinary characteristics. Ferrite ...

Claims

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Application Information

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IPC IPC(8): C04B35/26C04B35/28C04B35/32C04B35/626
Inventor 李耀刚陈学诚侯成义王宏志张青红
Owner DONGHUA UNIV
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