Preparation method of composite material of graphite flake-load barium ferrite nanoparticles

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

Inactive Publication Date: 2013-02-20
UNIV OF SHANGHAI FOR SCI & TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

However, the iron ferric oxide nanoparticles prepared by this invention are easily oxidized,

Method used

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  • Preparation method of composite material of graphite flake-load barium ferrite nanoparticles
  • Preparation method of composite material of graphite flake-load barium ferrite nanoparticles

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0022] (A). 5.94g of FeCl 3 ·6H 2 O (analytical pure) was placed in a beaker, and 50mL of deionized water was added to dissolve it completely, and then 5.5mL of concentrated ammonia water (analytical pure) solution was slowly added dropwise under strong stirring, and after standing for aging, the upper layer After absorbing the suspended impurities, add 0.006mol of barium acetate (analytical pure) solution and stir evenly;

[0023] (B). Add 44g of sodium hydroxide (analytically pure) to the mixed solution prepared in step (A), and add a certain amount of absolute ethanol solution, then stir to make it completely dissolve, and the added absolute ethanol The volume is 20% of the total volume of the mixed solution, and the total volume of the mixed solution must not exceed 150mL;

[0024] (C). Add 10g of natural graphite into the mixed solution of concentrated nitric acid and concentrated hydrochloric acid, wherein the concentrated nitric acid is 150mL, and the concentrated hyd...

Embodiment 2

[0031] (A). Add 6.5g of FeCl 3 ·6H 2 O (analytical pure) was placed in a beaker, and 50mL of deionized water was added to dissolve it completely. Then, under strong stirring, 6mL of concentrated ammonia water (analytical pure) solution was slowly dropped into it. After standing for aging, the upper layer was suspended. After absorbing the impurities, add 0.006mol of barium acetate (analytical grade) solution and stir evenly;

[0032] (B). Add 46g of sodium hydroxide (analytically pure) to the mixed solution prepared in step (A), and add a certain amount of absolute ethanol solution, then stir to make it completely dissolve, and the added absolute ethanol The volume is 20% of the total volume of the mixed solution, and the total volume of the mixed solution must not exceed 160mL;

[0033](C). Add 10g of natural graphite into the mixed solution of concentrated nitric acid and concentrated hydrochloric acid, wherein the concentrated nitric acid is 150mL, and the concentrated hy...

Embodiment 3

[0038] (A). 5.6g of FeCl 3 ·6H 2 O (analytical pure) was placed in a beaker, and 50mL of deionized water was added to dissolve it completely. Then, under strong stirring, 5mL of concentrated ammonia water (analytical pure) solution was slowly dropped into it. After standing for aging, the upper layer was suspended. After absorbing the impurities, add 0.006mol of barium acetate (analytical grade) solution and stir evenly;

[0039] (B). Add 42g of sodium hydroxide (analytical pure) to the mixed solution prepared in step (A), and add a certain amount of absolute ethanol solution, then stir to make it completely dissolve, and the added absolute ethanol The volume is 20% of the total volume of the mixed solution, and the total volume of the mixed solution must not exceed 150mL;

[0040] (C). Add 10g of natural graphite into 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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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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