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A 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, Process complexity and other problems, to achieve the effect of easy large-scale production, high cost and complex process

Active Publication Date: 2021-12-24
SOUTHEAST UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

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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  • A preparation method of ordered phase iron-platinum nanoparticles and cobalt-platinum nanoparticles

Examples

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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 method for preparing iron-platinum nanoparticles and cobalt-platinum nanoparticles in ordered phases. Iron acetylacetonate (or cobalt) and chloroplatinic acid are dissolved in an organic solvent as an impregnating solution, impregnated with sodium chloride powder, and dried Reduction at the melting point of sodium chloride, washing with water to obtain iron-platinum (or cobalt-platinum) nanoparticles. The invention can rapidly prepare high-dispersion ordered phase iron-platinum nano-particles and cobalt-platinum nano-particles in batches, and the particle size is 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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Patent Type & Authority Patents(China)
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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