Chemical preparation method of cobalt-iron alloy nanopowder

A technology of nano-alloy powder and cobalt iron, which is applied in the direction of nanotechnology, can solve the problems of difficult reduction preparation, etc., and achieve the effects of low preparation cost, mild reaction conditions and simple process

Inactive Publication Date: 2015-04-29
UNIV OF SCI & TECH BEIJING
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

The process of this invention is simple, the cost of raw materials is low, and it can achieve economical macro-production, but it is difficult to prepare cobalt-iron (CoFe) alloy powder by using only one of hydrazine hydrate or sodium borohydride as a reducing agent.

Method used

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  • Chemical preparation method of cobalt-iron alloy nanopowder
  • Chemical preparation method of cobalt-iron alloy nanopowder
  • Chemical preparation method of cobalt-iron alloy nanopowder

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0031] 1. Preparation of reaction solution:

[0032] 1) Preparation of metal salt solution:

[0033] Use ethylene glycol as solvent to prepare solutions in the following proportions.

[0034] CoSO 4 0.04mol / L

[0035] FeSO 4 0.01mol / L

[0036] temperature 25°C

[0037] CTAB 0.70g / L

[0038] Stirring time 20 min

[0039] 2) Preparation of reducing agent solution ①:

[0040] Use ethylene glycol as solvent to prepare solutions in the following proportions.

[0041] KOH 0.20mol / L

[0042] Hydrazine hydrate 2.00 mL

[0043] temperature 25°C

[0044] Stirring time 20 min

[0045] 3) Preparation of reducing agent solution ②:

[0046] Use ethylene glycol as solvent to prepare solutions in the following proportions.

[0047] KOH 0.20mol / L

[0048] KBH 4 0.67g / L

[0049] temperature 25°C

[0050] Stirring time 20 min

[0051] 2. Preparation of cobalt-iron nanoparticles:

[0052] (1) Heat the solutions prepared by the above method to...

Embodiment 2

[0062] 1. Preparation of reaction solution:

[0063] 1) Preparation of metal salt solution:

[0064] Use ethylene glycol as solvent to prepare solutions in the following proportions.

[0065] CoSO 4 0.08mol / L

[0066] FeSO 4 0.01mol / L

[0067] temperature 25°C

[0068] PVP K30 0.70g / L

[0069] Stirring time 20 min

[0070] 2) Preparation of reducing agent solution ①:

[0071] Use ethylene glycol as solvent to prepare solutions in the following proportions.

[0072] KOH 0.80mol / L

[0073] Hydrazine hydrate 16.00mL

[0074] temperature 25°C

[0075] Stirring time 20 min

[0076] 3) Preparation of reducing agent solution ②:

[0077] Use ethylene glycol as solvent to prepare solutions in the following proportions.

[0078] KOH 0.80mol / L

[0079] KBH 4 0.67g / L

[0080] temperature 25°C

[0081] Stirring time 20 min

[0082] 2. Preparation of cobalt-iron nanoparticles:

[0083] (1) Heat the solution prepared by the above method ...

Embodiment 3

[0093] 1. Preparation of reaction solution:

[0094] 1) Preparation of metal salt solution:

[0095] Prepare solutions in the following ratios using water as solvent.

[0096] Co(NO 3 ) 2 0.04mol / L

[0097] Fe (NO 3 ) 3 0.01mol / L

[0098] temperature 25°C

[0099] PVP K30 0.70g / L

[0100] Stirring time 25 minutes

[0101] 2) Preparation of reducing agent solution ①:

[0102] Prepare solutions in the following ratios using water as solvent.

[0103] KOH 1.00mol / L

[0104] Hydrazine hydrate 2.00 mL

[0105] temperature 25°C

[0106] Stirring time 25 minutes

[0107] 2) Preparation of reducing agent solution ②:

[0108] Prepare solutions in the following ratios using water as solvent.

[0109] KOH 1.00mol / L

[0110] KBH 4 0.67g / L

[0111] temperature 25°C

[0112] Stirring time 25 minutes

[0113] 2. Preparation of cobalt-iron nanoparticles:

[0114] (1) Heat the solutions prepared by the above method to 70 °C respecti...

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Abstract

The invention relates to chemical preparation of nanopowder materials, in particular to a chemical preparation method of cobalt-iron alloy nanopowder. The method includes: with hydrazine hydrate and potassium borohydride as reductant, using the hydrazine hydrate to reduce metallic cobalt and iron ions in specific solvent into light pink sticky cobalt-iron precursor; using potassium borohydride solution dissolved with the specific solvent, to reduce the light pink sticky cobalt-iron precursor into metallic cobalt and iron atoms, and allowing the atoms to re-gather and grow into cobalt-iron alloy nanoparticles. The method has the advantages the cobalt-iron alloy nanopowder can be prepared by the method, particle morphology is under control, the prepared cobalt-iron alloy nanoparticles are spherical with the particle size of 50 to 800 nm, evenly distributed, and conditions are created for the actual application of the cobalt-iron alloy nanopowder.

Description

technical field [0001] The invention relates to the preparation of nano powder materials by chemical methods, in particular to the preparation of nano cobalt-iron (CoFe) alloy powder. Background technique [0002] Due to their unique physical and chemical properties such as small size effect and surface effect, nanomaterials are widely used in energy materials, ecological environment materials, functional coating materials, high-performance electronic materials and other fields. CoFe alloy is a metal soft magnetic material, which is widely used in the manufacture of magnetic recording, sensors, ferrofluid and other functional components. At the same time, the magnetic properties, catalytic properties and microwave absorption properties of cobalt-iron nano-alloy powders vary with the chemical composition and grain size of the particles. Choosing a certain preparation method can obtain alloy powder with controllable particle size and chemical composition, and then adjust an...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B22F9/24B82Y40/00
Inventor 俞宏英孙冬柏刘世英孟惠民
Owner UNIV OF SCI & TECH BEIJING
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