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A kind of preparation method of graphite sheet-loaded barium ferrite nanoparticle composite material

A nanoparticle and composite material technology, applied in the field of composite magnetic material preparation, can solve the problems of easy oxidation, poor chemical stability, and expensive raw material carbon nanotubes, and achieve the effects of lower synthesis temperature, uniform distribution, and lower chemical reaction energy

Inactive Publication Date: 2014-10-15
UNIV OF SHANGHAI FOR SCI & TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, the iron ferric oxide nanoparticles prepared by this invention are easily oxidized, have poor chemical stability, and the raw material carbon nanotubes are relatively expensive.

Method used

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  • A kind of preparation method of graphite sheet-loaded barium ferrite nanoparticle composite material
  • A kind of preparation method of graphite sheet-loaded barium ferrite nanoparticle composite material

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0021] (A). 5.94g of FeCl 3 ·6H 2 O (analytical pure) is placed in a beaker, after adding 50mL of deionized water to make it completely dissolved, under the condition of vigorous stirring, slowly drop 5.5mL of concentrated ammonia water (analytical pure) solution, after standing for aging, the upper layer After the suspended impurities are removed, add 0.006mol of barium acetate (analytical grade) solution and stir evenly;

[0022] (B). Add 44g of sodium hydroxide (analytically pure) to the mixed solution prepared in step (A), and add a certain amount of dehydrated alcohol solution, then stir to make it dissolve completely, wherein the dehydrated alcohol added The volume is 20% of the total volume of the mixed solution, and the total volume of the mixed solution must not exceed 150mL;

[0023] (C). Add 10g of natural graphite to the mixed solution of concentrated nitric acid and concentrated hydrochloric acid, wherein the concentrated nitric acid is 150mL, and the concentrat...

Embodiment 2

[0030] (A). 6.5g of FeCl 3 ·6H 2 O (analytical pure) is placed in a beaker, after adding 50mL of deionized water to dissolve it completely, under the condition of strong stirring, slowly drop 6mL of concentrated ammonia water (analytical pure) solution, after standing for aging, suspend the upper layer After the impurity suction is removed, add the barium acetate (analytical grade) solution of 0.006mol, and stir;

[0031] (B). Add 46g of sodium hydroxide (analytically pure) to the mixed solution prepared in step (A), and add a certain amount of dehydrated alcohol solution, then stir to make it dissolve completely, wherein the dehydrated alcohol added The volume is 20% of the total volume of the mixed solution, and the total volume of the mixed solution must not exceed 160mL;

[0032](C). Add 10g of natural graphite to the mixed solution of concentrated nitric acid and concentrated hydrochloric acid, wherein the concentrated nitric acid is 150mL, and the concentrated hydrochl...

Embodiment 3

[0037] (A). 5.6g of FeCl 3 ·6H 2 O (analytical pure) is placed in a beaker, after adding 50mL of deionized water to dissolve it completely, under the condition of strong stirring, slowly drop 5mL of concentrated ammonia water (analytical pure) solution, after standing for aging, suspend the upper layer After the impurity suction is removed, add the barium acetate (analytical grade) solution of 0.006mol, and stir;

[0038] (B). Add 42g of sodium hydroxide (analytically pure) to the mixed solution prepared in step (A), and add a certain amount of dehydrated alcohol solution, then stir to make it dissolve completely, wherein the dehydrated alcohol added The volume is 20% of the total volume of the mixed solution, and the total volume of the mixed solution must not exceed 150mL;

[0039] (C). Add 10g of natural graphite to the mixed solution of concentrated nitric acid and concentrated hydrochloric acid, wherein the concentrated nitric acid is 150mL, and the concentrated hydroch...

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Abstract

The invention provides a preparation method of a composite material of graphite flake-load barium ferrite nanoparticles, which comprises the following steps of: firstly adding barium acetate to ferric hydroxide sediment prepared by using FeCl3.6H2O and stronger ammonia water; then adding sodium hydroxide and absolute ethyl alcohol solutions, uniformly stirring, and then adding natural graphite activated by concentrated nitric acid and concentrated hydrochloric acid; uniformly stirring again, then introducing argon, and then carrying out ultrasonic treatment for 5 hours; finally placing a mixed solution subjected to the ultrasonic treatment into a high-temperature reaction kettle, carrying out heat preservation at 180-200 DEG C for 18-24 hours, repeatedly washing by using deionized water after cooling, then acid-washing by using an 0.1 mol / L HCl solution and finally diluting the solution to be neutral and then drying at 70 DEG C, thus obtaining the composite material of the graphite flake-loading barium ferrite nanoparticles. The obtained graphite flake-loading barium ferrite nanoparticles have high loading quantity, good dispersity and stable structure. The preparation method provided by the invention is simple in preparation process, low in equipment cost and environment-friendly without pollution and provides a new way for the preparation of composite magnetic materials.

Description

technical field [0001] The invention relates to a method for preparing a composite material of barium ferrite nanoparticles supported by graphite sheets, and belongs to the technical field of composite magnetic material preparation. Background technique [0002] BaFe 12 o 19 Hexagonal ferrite is an important magnetic ceramic with high saturation magnetization, high coercive force, high magnetocrystalline anisotropy field, high Curie temperature and excellent chemical stability. In addition, BaFe 12 o 19 It is an electromagnetic wave absorbing material with complex phase dielectric loss and magnetic loss, so it has attracted more and more attention from people. Currently synthesized BaFe 12 o 19 There are many methods, such as chemical precipitation method, sol-gel method, hydrothermal method, self-propagating method and molten salt method, etc., but as a wave-absorbing material, BaFe 12 o 19 The density is high, and it is mainly manifested as magnetic loss, so its app...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): H01F1/01
Inventor 唐宏志王树林徐波赵立峰张永刚
Owner UNIV OF SHANGHAI FOR SCI & TECH
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