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Graphene-supported ferroferric oxide magnetic powder particles and preparation method thereof

A technology of ferromagnetic tetroxide and graphene, applied in the direction of graphene, iron oxide/ferric hydroxide, ferrous oxide, etc., can solve the problem of reducing detection sensitivity, repeated utilization of magnetic powder, and easy agglomeration of nanoparticles. , increase the coercivity and remanence, etc., to achieve the effect of excellent suspension, good application prospects, and increased dispersion and fluidity

Pending Publication Date: 2020-02-04
上海船舶工程质量检测有限公司 +1
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  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0005] However, the above method has the following defects: the small size effect of nanomaterials makes the nanoparticles easy to agglomerate, which will increase the coercive force and remanence, reduce the detection sensitivity and the repeated utilization rate of magnetic powder

Method used

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  • Graphene-supported ferroferric oxide magnetic powder particles and preparation method thereof
  • Graphene-supported ferroferric oxide magnetic powder particles and preparation method thereof

Examples

Experimental program
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Effect test

Embodiment 1

[0028] (1) After mixing 0.3 g of ferric chloride hexahydrate, 0.5 g of ferric dichloride tetrahydrate, 0.5 g of sodium hydroxide, and 10 ml of graphene oxide aqueous solution (containing 20 mg of graphene oxide) with a concentration of 2 mg / ml Ultrasonic treatment was carried out for 120 minutes to obtain a uniform mixed solution A;

[0029] (2) Put the mixed solution A under constant temperature reflux for reaction, the reaction temperature is 25°C, the generated ferric hydroxide and ferrous hydroxide gradually grow as nuclear particles, and the reaction time is 0.5h; then 1ml concentration is 10wt% Aqueous ammonia is added to the reaction system to obtain a mixed solution B;

[0030] (3) Continue to react the mixed solution B under constant temperature reflux, the reaction temperature is 75°C, and the reaction is completed after reflux for 2 hours, and the reaction solution is obtained;

[0031] (4) Centrifuge the reaction solution to obtain solid matter, and dry it in a va...

Embodiment 2

[0034] (1) After mixing 0.3 g of ferric chloride hexahydrate, 0.5 g of ferric dichloride tetrahydrate, 0.5 g of sodium hydroxide, and 5 ml of a graphene oxide aqueous solution (containing 10 mg of graphene oxide) with a concentration of 2 mg / ml Perform ultrasonic treatment for 60 minutes to obtain a uniform mixed solution A;

[0035] (2) Put the mixed solution A under constant temperature reflux for reaction, the reaction temperature is 40°C, the generated ferric hydroxide and ferrous hydroxide gradually grow as nuclear particles, and the reaction time is 1h; then add 2ml of 28wt% Add ammonia water to the reaction system to obtain mixed solution B;

[0036] (3) Continue to react the mixed solution B under constant temperature reflux, the reaction temperature is 100°C, and the reaction is completed after reflux for 3 hours to obtain the reaction solution;

[0037] (4) Centrifuge the reaction solution to obtain a solid, and dry it in a vacuum oven at 40°C after washing to obtai...

Embodiment 3

[0040](1) After mixing 0.3 g of ferric chloride hexahydrate, 0.5 g of ferric dichloride tetrahydrate, 0.5 g of sodium hydroxide, and 10 ml of a graphene oxide aqueous solution (containing 30 mg of graphene oxide) with a concentration of 3 mg / ml Ultrasonic treatment was carried out for 150 minutes to obtain a uniform mixed solution A;

[0041] (2) Put the mixed liquid A under constant temperature reflux for reaction, the reaction temperature is 30°C, the generated ferric hydroxide and ferrous hydroxide gradually grow as nuclear particles, and the reaction time is 0.75h; then 3ml concentration is 20wt% Aqueous ammonia is added to the reaction system to obtain a mixed solution B;

[0042] (3) Continue to react the mixed solution B under constant temperature reflux, the reaction temperature is 50°C, and the reaction is completed under reflux for 1 hour to obtain the reaction solution;

[0043] (4) Centrifuge the reaction solution to obtain a solid, and dry it in a vacuum oven at ...

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Abstract

The invention provides a preparation method of graphene-supported ferroferric oxide magnetic powder particles. The preparation method comprises the steps as follows: (1) ferric trichloride hexahydrate, ferric dichloride tetrahydrate and sodium hydroxide are uniformly mixed with an aqueous solution of graphene oxide to obtain a mixed solution A; (2) the mixed solution A is placed under constant-temperature reflux for reaction, produced ferric hydroxide and ferrous hydroxide gradually grow as nuclear particles, and then, ammonium hydroxide is added to a reaction system to obtain a mixed solutionB; (3) the mixed solution B reacts under the constant-temperature reflux continuously to obtain a reaction solution after the reaction; and (4) the reaction solution is subjected to centrifugal separation to obtain a solid, and washing and drying are performed to obtain the graphene-supported ferroferric oxide magnetic powder particles. The graphene-supported ferroferric oxide magnetic powder particles obtained by the invention show excellent magnetic properties and suspension property and have better application prospects in the nondestructive testing field.

Description

technical field [0001] The invention belongs to the technical field of nondestructive testing, and in particular relates to a graphene-loaded ferric oxide magnetic powder particle and a preparation method thereof. Background technique [0002] Ferroferric oxide is an important magnetic powder material for nondestructive testing, which has attracted great attention in recent years due to its unique electromagnetic properties. It is well known that the performance of magnetic powder materials is related to the morphology of the material, especially the crystal growth and size of the material. Nano-ferroferric oxide has good magnetic properties and is easy to prepare composite materials. As a magnetic powder material, it has a good application prospect in non-destructive testing such as aviation and ships. There are many areas for improvement; adjusting the ferric oxide crystal nucleus can improve the selectivity of non-destructive testing; but due to the small size effect of ...

Claims

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Application Information

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IPC IPC(8): C01B32/184C01G49/08G01N27/84
CPCC01B32/184C01G49/08G01N27/84C01P2004/04
Inventor 陆雷俊张中强易一平
Owner 上海船舶工程质量检测有限公司
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