Preparation method of ordered phase iron-platinum nanoparticles and cobalt-platinum nanoparticles

A nanoparticle, ordered phase technology, applied in nanotechnology, nanotechnology, nanotechnology for materials and surface science, etc., can solve the problem of no large-scale preparation of ordered phase FePt/CoPt nanoparticles, high preparation cost, problems such as complex procedures, to achieve the effects of easy large-scale production, high cost and complex procedures

Active Publication Date: 2019-04-12
SOUTHEAST UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

However, this method not only needs to prepare disordered phase FePt / CoPt particles in advance, but also needs to grind the salt particles. The process is complicated and the preparation cost is too high. It is only suitable for preparing a small amount of samples in the laboratory.
[0005] In summary, the ordered phase FePt / CoPt nanoparticles prepared by the prior art have the disadvantages of high preparation cost and complex process, and there is no convenient method for large-scale preparation of ordered phase FePt / CoPt nanoparticles

Method used

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  • Preparation method of ordered phase iron-platinum nanoparticles and cobalt-platinum nanoparticles

Examples

Experimental program
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Embodiment 1

[0032] Example 1: Use equimolar amounts of iron acetylacetonate and chloroplatinic acid to configure an ethanol solution with a concentration of 0.1 mol / L, impregnate the sodium chloride powder, remove the excess impregnating liquid, and then dry the powder. The dried powder is reduced with hydrogen at 800°C, washed with water, and dried to obtain iron-platinum nanoparticles in an ordered phase.

Embodiment 2

[0033] Example 2: Equimolar iron acetylacetonate and chloroplatinic acid are used to form an ethanol solution with a concentration of 0.01 mol / L, and the sodium chloride powder is impregnated. After removing excess impregnating liquid, the powder is dried. The dried powder is reduced with hydrogen at 800°C, washed with water, and dried to obtain iron-platinum nanoparticles in an ordered phase.

Embodiment 3

[0034] Example 3: Use equimolar amounts of iron acetylacetonate and chloroplatinic acid to configure an ethanol solution with a concentration of 1 mol / L, impregnate the sodium chloride powder, remove the excess impregnating liquid, and dry the powder. The dried powder is reduced with hydrogen at 800°C, washed with water, and dried to obtain iron-platinum nanoparticles in an ordered phase.

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Abstract

The invention discloses a preparation method of ordered phase iron-platinum nanoparticles and cobalt-platinum nanoparticles. The method comprises the steps that ferric (or cobalt) acetylacetonate andchloroplatinic acid are dissolved in organic solvent as impregnation liquid; sodium chloride powder is impregnated; after drying, reduction is performed below the sodium chloride melting point; and after water washing is performed, the iron-platinum (or cobalt-platinum) nanoparticles are obtained. By means of the preparation method, the high-dispersibility ordered phase iron-platinum nanoparticlesand cobalt-platinum nanoparticles can be fast prepared in bulk, and the particle sizes are uniform.

Description

technical field [0001] The invention relates to a method for preparing ordered phase iron-platinum nanoparticles and cobalt-platinum nanoparticles, belonging to the field of magnetic alloy particle preparation. Background technique [0002] Ordered phase (aka L1 0 phase, face-centered tetragonal phase) iron platinum (FePt) and cobalt platinum (CoPt) nanoparticles have high magnetocrystalline anisotropy constants, and therefore have ultra-small superparamagnetic critical dimensions (D = 2.8 ~ 3.3nm), At the same time, the iron-platinum and cobalt-platinum nanoparticles in the ordered phase have high coercive force, high magnetic energy product, high Curie temperature (Tc=480° C.) and good physical and chemical stability. Therefore, ordered iron-platinum and cobalt-platinum nanoparticles have been widely concerned, and have good application prospects in future ultra-high-density magnetic recording media, new nano-exchange elastic magnet materials, and high-performance catalys...

Claims

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Application Information

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IPC IPC(8): B22F9/22B22F1/00B82Y30/00B82Y40/00
CPCB82Y30/00B82Y40/00B22F9/22B22F1/054
Inventor 董岩唐振明杨凯成邵起越蒋建清
Owner SOUTHEAST UNIV
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