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Preparation method of copper oxide-ferric oxide composite magnetic material with core-shell structure

A composite magnetic material, ferric oxide technology, applied in the direction of iron oxide/iron hydroxide, copper oxide/copper hydroxide, ferrous oxide, etc., to achieve the effect of increasing specific saturation magnetization and improving magnetic properties

Inactive Publication Date: 2016-10-05
姚阿连
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

However, there is still a lack of a technology that can effectively achieve high magnetic substance content on submicron-scale magnetic composite microspheres.

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0022] Ingredients in parts by weight:

[0023] FeCl 3 45

[0024] FeCl 2 12

[0025] Deionized water 300

[0026] Citric acid 15

[0027] 1mol / L sodium hydroxide solution 100

[0028] After mixing the above substances evenly, react at 120°C for 6 hours, and the product is magnetically separated, washed with water and dried in vacuum to obtain Fe 3 o 4 particles.

[0029] the above Fe 3 o 4 The particles are evenly dispersed in distilled water, and 0.5mol / L copper nitrate aqueous solution and 35% ammonia water are added, wherein the above-mentioned Fe 3 o 4 The mass ratio of granules, distilled water, copper nitrate aqueous solution and ammonia water is 1:50:0.5:1, and the mixture is heated to 65°C under stirring, kept for 15 minutes, cooled, and the product is magnetically separated, washed with water, and dried in vacuum. Sintering under protection to obtain ferric oxide particles coated with copper oxide on the surface.

[0030] Disperse the above-mentioned i...

Embodiment 2

[0033] Ingredients in parts by weight:

[0034] FeCl 3 55

[0035] FeCl 2 15

[0036] Deionized water 500

[0037] Citric acid 30

[0038] 2mol / L sodium hydroxide solution 50

[0039] After mixing the above substances evenly, react at 150°C for 4 hours, and the product is magnetically separated, washed with water and dried in vacuum to obtain Fe 3 o 4 particles.

[0040] the above Fe 3 o 4 The particles are uniformly dispersed in distilled water, and 1mol / L copper nitrate aqueous solution and 35% ammonia water are added, wherein the above-mentioned Fe 3 o 4 The mass ratio of particles, distilled water, copper nitrate aqueous solution, and ammonia water is 1:80:1:1. Heat the mixture to 75°C under stirring, keep it for 10 minutes, and cool it. The product is magnetically separated, washed with water, and dried in vacuum. Sintering under protection to obtain ferric oxide particles coated with copper oxide on the surface.

[0041] Disperse the above-mentioned iron f...

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Abstract

The invention relates to a preparation method of a copper oxide-ferroferric oxide composite magnetic material in a core-shell structure. The preparation method comprises the following steps: (1) preparing ferroferric oxide particles; (2) preparing ferroferric oxide particles coated by copper oxide on the surface; and (3) preparing the composite magnetic material in the core-shell structure. According to the composite magnetic material in the core-shell structure prepared by the invention, ferroferric oxide is coated by copper oxide, so that the magnetic performance is improved. The core-shell structure with high content of core magnetic material is formed by adopting a special process, so that the specific saturation magnetization is greatly improved.

Description

technical field [0001] The invention relates to a method for preparing a copper oxide-ferric oxide composite magnetic material with a core-shell structure. Background technique [0002] Nano magnetic ferroferric oxide materials are widely used. Its unique electrical and magnetic properties make it have broad application prospects in magnetic recording materials, magnetic liquids, biomedicine, permanent magnetic materials and other fields. It has attracted much attention for its excellent properties and wide application potential. In recent years, ferroferromagnetic nanoparticles (Fe3O4) have been widely used in various biomedical fields, such as cell separation and purification, magnetically controlled anticancer drug delivery, tumor magnetic hyperthermia, and magnetic resonance imaging (MRI). [0003] Bare iron ferric oxide nanoparticles are very easy to oxidize because of their high chemical reactivity, and at the same time, the large specific surface area makes the nanop...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C01G49/08C01G3/02H01F1/11B82Y30/00
Inventor 姚阿连
Owner 姚阿连
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