Method for preparing L10-FePt Nano-particles through water bath alternate reduction

A technology of l10-fept and nanoparticles, applied in the field of alternate reduction of water bath to prepare L10-FePt nanoparticles, can solve the problems of carbonyl iron being highly toxic and unsuitable for large-scale use, and achieve the effect of reducing the ordering temperature

Inactive Publication Date: 2012-09-26
NORTHWESTERN POLYTECHNICAL UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0003] Thermal decomposition of carbonyl iron and reduction of platinum acetylacetonate are commonly used early meth

Method used

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  • Method for preparing L10-FePt Nano-particles through water bath alternate reduction
  • Method for preparing L10-FePt Nano-particles through water bath alternate reduction

Examples

Experimental program
Comparison scheme
Effect test

preparation example 1

[0016] 1. With the sample: the H 2 PtCl 6 ·6H 2 O(n Pt mol) is soluble in water, the volume of water (liter) is related to n pt (mole) ratio is 25:1, dubbed into aqueous solution; FeCl 2 4H 2 O(n Fe mol) is soluble in water, the volume of water (liter) is related to n Fe (mole) ratio is 25:1, made into an aqueous solution, weighed CTAB n Fe +n Pt mol.

[0017] 2. Experimental steps

[0018] ①Put CTAB into a three-necked flask to make an aqueous solution. The ratio of the volume of water (liter) to the molar amount of CTAB is 25:1. Heat the three-neck flask to 70°C in a collector-type constant temperature heating magnetic stirrer, keep stirring and argon until the end of the experiment.

[0019] ② Set the molar weight as n Fe +n Pt The hydrazine hydrate was added to the three-necked flask, and then the Pt 2+ One-tenth of the solution was dripped into the three-neck flask very slowly (dropping time was 10 minutes) and evenly. After the dropwise addition was compl...

preparation example 2

[0025] 1. Sample preparation is the same as Example 1

[0026] 2. Experimental steps

[0027] ① Put CTAB(n Fe +n Pt mol) into a three-necked flask to form an aqueous solution, in which the ratio of the volume of water (liter) to the molar amount of CTAB is 25:1. Heat the three-neck flask to 70°C in a collector-type constant temperature heating magnetic stirrer, keep stirring and pass argon protection gas until the end of the experiment.

[0028] ② put n Fe +n Pt Moles of hydrazine hydrate were added to the three-necked flask, and then the Fe 2+ One-tenth of the solution was dripped into the three-necked flask very slowly (dropping time was 10 minutes) and evenly, and reacted for 30 minutes.

[0029] ③Inject Pt with an infusion set needle 2+ One-tenth of the solution was slowly and evenly dropped into the three-necked flask (dropping time was 10 minutes), and reacted for 30 minutes.

[0030] ④ Repeat steps ② and ③ 10 times, adding FeCl alternately 2 4H 2 O solution a...

preparation example 3

[0033] 1. Sample preparation is the same as Example 1

[0034] 2. Experimental steps

[0035]

x1

x2

x3

x4

x5

x6

x7

x8

x9

x10

Fe 2+

0.025V

0.042V

0.058V

0.072V

0.092V

0.108V

0.125V

0.142V

0.158V

0.175V

Pt 2+

0.025V

0.042V

0.058V

0.072V

0.092V

0.108V

0.125V

0.142V

0158V

0.175V

[0036] ① Put CTAB(n Fe +n Pt mol) into a three-necked flask to form an aqueous solution, wherein the ratio of the volume of water (liter) to the molar amount of CTAB is 25:1. Heat the three-neck flask to 70°C in a collector-type constant temperature heating magnetic stirrer, keep stirring and pass argon protection gas until the end of the experiment.

[0037] ② put n Fe +n Pt Mole of hydrazine hydrate was added to the three-necked flask, and then x1 ml FeCl 2 4H 2 O solution is dropped ...

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Abstract

The invention relates to a method for preparing L10-FePt Nano-particles through water bath alternate reduction, and the method comprises the following steps of: controlling degree of order of Fe elements and Pt elements in particles; modulating chemical degree of order of the Nano-particles, thereby reducing phase transformation temperature of the Nano-particles; the phase transformation temperature of the L10-FePt Nano-particles is reduced, so that the L10-FePt Nano-particles are of important significance in application of ultrahigh density information storage field. In the method, FePt Nano-particles can be prepared at a lower temperature through a simple operation craft and a low-cost experiment method. The FePt Nano-particles prepared by the method disclosed by the invention is of a certain chemical order, therefore, ordering temperature of the L10-FePt Nano-particles can be effectively reduced, and the method disclosed by the invention belongs to a development field for ultrahigh density perpendicular magnetic recording materials...

Description

technical field [0001] The present invention relates to a kind of water bath alternating reduction preparation L1 0 - A method of preparing FePt nanoparticles involving a chemically ordered L1 0 - Chemistry of FePt nanoparticles. Background technique [0002] L1 0 -FePt nanoparticles have high magnetocrystalline anisotropy (K=6.6×10 6 ~10×10 6 jm -3 ), high coercive force, high magnetic energy product, high Curie temperature (Tc=480°C) and very low superparamagnetic critical size (D=2.8-3.3nm), and good chemical stability, is The most promising ultra-high-density magnetic storage material for the next generation. Compared to physical deposition methods, chemically synthesized, self-assembled L1 0 -FePt nanostructure has the advantages of easy-to-obtain raw materials, simple equipment, mild preparation conditions, easy large-scale industrial production, narrow particle size distribution, and controllable size and shape. It has great application prospects in the field o...

Claims

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Application Information

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IPC IPC(8): B22F9/24
Inventor 白晓军曹崇德张媛媛
Owner NORTHWESTERN POLYTECHNICAL UNIV
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