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Process for preparing nano granule with high shape anisotropic property

A particle and cobalt nanotechnology, which is applied in the field of preparation of magnetic functional nanoparticles, can solve the problems of uneven reaction, unsuitability for industrialized large-scale production, and inability to obtain nanoparticles, etc., to achieve low price, uniform particles, and good repeatability Effect

Inactive Publication Date: 2007-03-07
天津佰腾生产力促进中心有限公司
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  • Claims
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Problems solved by technology

[0005] C.P.Gibson (referring to Science, 1995,267:1338) once utilized hydrazine hydrate as reducing agent, under the effect of ultra-high-energy ultrasonic wave, has made the hexagonal flaky cobalt nano-particle that average diameter is 100nm, but this method needs high Energy ultrasonic device, and the uneven ultrasonic energy at different positions in the solution will lead to uneven reaction, which is not suitable for industrial mass production
In addition, this method can only prepare a mixture of face-centered cubic and close-packed hexagonal, and cannot obtain single-phase nanoparticles with a close-packed hexagonal structure.
[0006] Using simple chemical methods and cheap chemical reagents to synthesize single-phase close-packed hexagonal leaf-shaped cobalt nanoparticles with strong shape anisotropy and magnetocrystalline anisotropy in one step has not been reported so far.

Method used

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  • Process for preparing nano granule with high shape anisotropic property
  • Process for preparing nano granule with high shape anisotropic property
  • Process for preparing nano granule with high shape anisotropic property

Examples

Experimental program
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Embodiment 1

[0023] Embodiment 1. When preparing leaf-shaped cobalt nanosheets with a radial size of tens of microns, the specific process is as follows:

[0024] 1. Measure 0.1mol / L of CoCl 2 Pour 20ml of the solution into the reaction kettle, measure 2ml of the 0.1mol / L cetyltrimethylammonium bromide (CTAB) solution and pour it into the CoCl 2 In the solution, stir evenly to obtain a clear and transparent pink solution. Add 0.8ml of 25mol / L NaOH solution dropwise to this solution, stir and mix evenly to obtain a blue clear and transparent solution. At this time, add 2ml of N 2 h 4 ·H 2 O content is the hydrazine hydrate of 85%, stir evenly, screw on the reactor lid;

[0025] 2. Put the reaction kettle into an oven with a temperature of 180°C, take it out after keeping it warm for 1 hour, and open it after cooling to room temperature. There are silver gray powder and colorless solution in the reaction kettle;

[0026] 3. Washing and drying of cobalt nanoparticles. Pour off the colorl...

Embodiment 2

[0028] Embodiment 2. When preparing cobalt nanosheets with a radial size of several hundred nanometers, the specific process is as follows:

[0029] 1. Measure 0.1mol / L of CoCl 2 Pour 20ml of the solution into the reaction kettle, measure N 2 h 4 ·H 2 2ml of hydrazine hydrate with 85% O content was poured into CoCl 2 solution, stir evenly, and cover the lid of the reaction kettle;

[0030] 2. Put the reaction kettle into an oven with a temperature of 180°C, take it out after keeping it warm for 1 hour, and open it after cooling to room temperature. There are black powder and colorless solution in the reaction kettle;

[0031] 3. Washing and drying of cobalt nanoparticles. This step is the same as the process in Example 1.

[0032] The particles obtained in this example are sheet-like cobalt nanoparticles with a radial size of several hundreds of nanometers, as shown in FIG. 2 .

[0033] Carry out X-ray diffraction to the particle gained in embodiment 1 and embodiment 2, i...

Embodiment 3

[0034] Embodiment three, preparation binary alloy Fe 0.1 co 0.9 Flaky nanoparticles, the specific process is as follows:

[0035] 1. Weigh 0.2mmol of FeSO 4 ·7H 2 O and 1.8 mmol of CoCl 2 ·6H 2 O is put into the reaction kettle, pour 20ml distilled water into the reaction kettle, stir it with a glass rod and make it dissolve completely, obtain a clear and transparent solution, add dropwise 1.5ml of NaOH solution of 25mol / L in this solution, stir and mix, Obtain blue clear and transparent solution, now add 2ml N 2 h 4 ·H 2 O content is the hydrazine hydrate of 85%, stir evenly, screw on the reactor lid;

[0036] 2. Put the reaction kettle into an oven with a temperature of 180°C, take it out after 2 hours of heat preservation, and open it after cooling to room temperature. The reaction kettle contains gray-black powder and colorless solution;

[0037] 3.Fe 0.1 co 0.9 The steps of washing and drying the alloy nanoparticles are the same as those in Example 1. The prep...

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Abstract

The invention relates to a method for producing magnetic nanometer particles, with shape aeolotropism and magnetic crystal aeolotropism, or multi aeolotropism. Wherein, it can be used to prepare single-phase stack hexagonal (HCP) cobalt nanometer particles and binary or ternary alloy nanometer particles of iron, cobalt and nickel. The invention processes at 90-200Deg. C and more than one pressure reacts the metal salt or cobalt with water.

Description

technical field [0001] The invention relates to a method for preparing magnetic functional nanoparticles in metal materials, in particular to a method for preparing magnetic metal nanoparticles with shape anisotropy and magnetocrystalline anisotropy, or multi-anisotropy. The method of the invention is particularly suitable for preparing single-phase close-packed hexagonal structure (HCP) cobalt nanoparticles and binary or ternary alloy nanoparticles of corresponding components of iron, cobalt and nickel. Background technique [0002] Iron, nickel, cobalt and other metals and alloys are widely used in magnetic recording materials, high-performance microwave absorber materials, superalloy materials, hard alloy materials, corrosion-resistant alloy materials, catalytic catalyst materials, diamond tool materials and other fields. Compared with coarse-grained micropowder, due to the large specific surface area, small size and unique structural features, nano-scale metal particles ...

Claims

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Application Information

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IPC IPC(8): B22F9/24
Inventor 秦勇薛德胜高美珍
Owner 天津佰腾生产力促进中心有限公司
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