A kind of soft magnetic metal iron porous micro-wire and preparation method thereof

A technology of soft magnetic metals and micron wires, applied in the manufacture of inductors/transformers/magnets, magnetic objects, magnetic materials, etc., to achieve the effects of simple preparation process, low coercive force, and low production cost

Active Publication Date: 2022-07-15
SHENYANG POLYTECHNIC UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

At present, there are few reports on the preparation of one-dimensional soft magnetic metallic iron porous microwires by solvothermal one-step method

Method used

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  • A kind of soft magnetic metal iron porous micro-wire and preparation method thereof
  • A kind of soft magnetic metal iron porous micro-wire and preparation method thereof
  • A kind of soft magnetic metal iron porous micro-wire and preparation method thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0052] Described a kind of soft magnetic metal iron microwire with porous structure, its preparation step is as follows:

[0053] (1) Dissolve sodium hydroxide in isopropanol at room temperature to prepare a sodium hydroxide solution with a concentration of 1.4 mol / L.

[0054] (2) adding pyromellitic acid to the solution in step (1) and mixing well. The concentration of pyromellitic acid was 0.03 mol / L.

[0055] (3) At room temperature, isopropanol dissolves ferrous sulfate heptahydrate, and prepares a ferrous sulfate heptahydrate solution with a concentration of 0.01 mol / L.

[0056] (4) Add the solution of step (3) to the solution of step (2) and mix well.

[0057] (5) Add cetyltrimethylammonium bromide to the solution in step (4), and mix well. The concentration of cetyltrimethylammonium bromide was 0.01 mol / L.

[0058] (6) Add hydrazine hydrate to the solution in step (5) and mix well. The concentration of hydrazine hydrate was 1.9 mol / L.

[0059] (7) The solution in ...

Embodiment 2

[0066] The difference from Example 1 is that the concentration of ferrous sulfate heptahydrate is 0.02 mol / L, the solvothermal reaction temperature is 180°C, and the solvothermal reaction time is 12h. Its microstructure is Image 6 shown.

[0067] from Image 6 It can be seen that the prepared iron microwires are grown from iron particles, have a porous structure, and the pores are uniformly distributed in the iron microwires. Its length is about 650 μm, its diameter is about 18 μm, and its pore size is about 3-5 μm.

Embodiment 3

[0069] The difference from Example 1 is that the solvent is absolute ethanol, the concentration of sodium hydroxide is 1.8 mol / L, the ligand is sodium citrate dihydrate, the solvothermal reaction temperature is 180°C, and the solvothermal reaction time is 12h. Its microstructure is Figure 7 shown.

[0070] from Figure 7 It can be seen that the prepared iron microwires are grown from iron particles, have a porous structure, and the pores are uniformly distributed in the iron microwires. Its length is about 60 μm, its diameter is about 8 μm, and its pore size is about 1-2 μm.

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Abstract

The present invention provides a method for preparing soft magnetic metal iron porous micro-wires. The present invention adopts divalent iron salt as raw material and anhydrous ethanol, isopropanol and ethylene glycol as solvent to prepare soft magnetic wire by solvothermal reduction method. Metal iron porous microwires. The method obtains iron micro-wires with different lengths, different diameters and different pore sizes by controlling factors such as reaction temperature, reaction time, reactant concentration, ligand and solvent types. The method for synthesizing the soft magnetic metal iron porous micrometer wire in one step requires simple equipment, simple preparation process and low production cost. The invention provides a new method for preparing soft magnetic metal iron porous micro-wires.

Description

technical field [0001] The invention relates to a preparation method of a soft magnetic metal material, in particular to a preparation method of a soft magnetic metal iron porous micron wire, and belongs to the field of magnetic material preparation. Background technique [0002] In recent years, magnetic materials have been widely used in electromagnetic wave absorption, sensitive components, magnetic storage, catalysts, medicine and biological functions due to their unique magnetic properties. As a special functional material for magnetoelectric conversion, soft magnetic material has high saturation magnetization and low coercivity, and is an important component for constructing new electromagnetic functional materials. The microstructure of soft magnetic materials determines its macroscopic properties. Therefore, many researchers strive to maintain a high magnetic flux by designing its structure, and control its coercive force and hysteresis loss to improve its macroscop...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): B22F9/16H01F1/14H01F41/02
CPCB22F9/16H01F1/143H01F41/02B22F2009/165
Inventor 王晓磊韩楠耿琪瑶王丽丽周新奥
Owner SHENYANG POLYTECHNIC UNIV
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