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Production method of graphite/iron carbide/ iron nanocomposite

A composite material and iron carbide technology, which is applied in the field of magnetic nano powder preparation, can solve the problems that are not suitable for large-scale industrial production, difficult to separate catalyst materials, and low product purity, and achieve high saturation magnetization, good dispersion, and reaction highly active effect

Active Publication Date: 2015-04-08
UNIV OF SCI & TECH BEIJING
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  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

These methods have disadvantages such as low yield, low product purity, and difficult separation from catalyst materials, and are not suitable for large-scale industrial production.

Method used

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  • Production method of graphite/iron carbide/ iron nanocomposite
  • Production method of graphite/iron carbide/ iron nanocomposite

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0018] Weigh 0.025 moles of ferric nitrate, 0.075 moles of glycine, and 0.05 moles of carbon source, dissolve various raw materials in distilled water to prepare a solution, and place the solution on a temperature-controllable electric furnace for heating. After the solution undergoes a series of reactions such as volatilization, concentration, and decomposition, a precursor powder containing iron and carbon is obtained, and the precursor powder is reacted at 800 ° C under a nitrogen atmosphere for 2 hours to obtain a graphite / iron carbide nanocomposite powder .

Embodiment 2

[0020] Weigh 0.025 moles of ferric nitrate, 0.075 moles of glycine, and 0.05 moles of carbon source, dissolve various raw materials in distilled water to prepare a solution, and place the solution on a temperature-controllable electric furnace for heating. After the solution undergoes a series of reactions such as volatilization, concentration, and decomposition, a precursor powder containing iron and carbon is obtained, and the precursor powder is reacted at 900 ° C under an argon atmosphere for 2 hours to obtain a graphite / iron nanocomposite powder .

Embodiment 3

[0022] Weigh 0.025 moles of ferric nitrate, 0.075 moles of glycine, and 0.075 moles of carbon source, dissolve various raw materials in distilled water to prepare a solution, and place the solution on a temperature-controllable electric furnace for heating. After the solution undergoes a series of reactions such as volatilization, concentration, and decomposition, the precursor powder containing iron and carbon is obtained, and the precursor powder is reacted at 1000 ° C for 0.5 hours under the conditions of argon atmosphere to obtain graphite / iron carbide / iron nano Composite powder.

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Abstract

The invention relates to a production method of a graphite / iron carbide / iron nanocomposite and belongs to the technical field of magnetic nanopowder production. The production method includes the processes: (1) dissolving ferric nitrate, adjuvants and a water-soluble carbon source in distilled water according to a proper proportion; (2) heating and stirring, and reacting solution after volatilization and concentration so as to obtain precursor powder containing iron and carbon; (3) reacting the precursor powder at the temperature of 700-1100 DEG C under a certain atmosphere for 0.5-2 hours. Graphite / iron carbide, graphite / iron or graphite / iron carbide / iron can be obtained respectively by regulating process parameters. The production method is simple in process, low in cost and easy for industrial production, and the obtained graphite / iron carbide / iron nanocomposite with the size less than 50nm is good in dispersibility and high in saturation magnetization.

Description

technical field [0001] The invention belongs to the technical field of magnetic nanometer powder preparation, and in particular relates to a production method of graphite / iron carbide / iron nanocomposite material powder. Background technique [0002] Carbon-coated magnetic nanoparticles are a new type of composite material. This material has unique structural characteristics, that is, magnetic nanoparticles are dispersed on the matrix of amorphous carbon or several layers of graphite are tightly coated on the periphery of magnetic nanoparticles, and the magnetic nanoparticles are at the core position, forming a core-shell structure. The carbon (graphite) coating layer not only makes the magnetism of the magnetic nanoparticles more stable, but also makes the particle dispersibility better, thus avoiding problems such as agglomeration due to interaction between magnetic particles without a coating layer on the surface. Carbon (graphite)-coated iron-based materials have attract...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B22F9/16B22F1/00
Inventor 秦明礼顾月茹曹知勤曲选辉黄敏刘烨
Owner UNIV OF SCI & TECH BEIJING
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