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

CN109604628BActive Publication Date: 2021-12-24SOUTHEAST UNIV

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Patent Information

Authority / Receiving Office: CN · China
Patent Type: Patents(China)
Current Assignee / Owner: SOUTHEAST UNIV
Publication Date: 2021-12-24

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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.

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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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