A fesibcr/sio 2 Preparation method of nanocrystalline soft magnetic composite iron core

A nanocrystalline soft magnetic and iron core technology, which is applied in the direction of inductance/transformer/magnet manufacturing, magnetic core manufacturing, magnetic objects, etc., can solve the problem of reducing the electromagnetic properties of soft magnetic composite powder and materials, the reaction process is difficult to control, and insulation coating Inhomogeneity and other problems, to achieve the effect of being suitable for popularization, good frequency stability, and no pollution to the environment

Active Publication Date: 2022-04-05
ANHUI UNIVERSITY OF TECHNOLOGY
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, most of the current preparations of soft magnetic composite powders have defects such as difficult control of the reaction process, uneven insulation coating, etc., and it is easy to introduce more SiO 2 Non-magnetic phase, greatly reducing the electromagnetic properties of soft magnetic composite powders and materials

Method used

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  • A fesibcr/sio <sub>2</sub> Preparation method of nanocrystalline soft magnetic composite iron core
  • A fesibcr/sio <sub>2</sub> Preparation method of nanocrystalline soft magnetic composite iron core
  • A fesibcr/sio <sub>2</sub> Preparation method of nanocrystalline soft magnetic composite iron core

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1-6

[0030] A FeSiBCr / SiO2 A method for preparing a nanocrystalline soft magnetic composite iron core, the method is carried out in the following steps:

[0031] (1) Add 50g of FeSiBCr amorphous powder and 300ml of absolute ethanol into a three-necked flask, mechanically stir (750r / min) at room temperature to disperse for 5min, add 50mL of ethanol / water solution (40mL of ethanol, the rest is deionized water) and continue to disperse 15min, put the solution in a constant temperature water bath and heat it to 40°C; dissolve 3.4g of silane coupling agent (APTES) in absolute ethanol to prepare 50mL solution and add it to the solution in the three-necked flask to surface FeSiBCr amorphous powder modified to obtain FeSiBCr amorphous powder solution.

[0032] (2) Prepare tetraethyl orthosilicate / ethanol solution and ammonia water / water / ethanol solution, draw them into 50mL syringes A and B respectively (syringe A: tetraethyl orthosilicate X mL, balance of absolute ethanol; syringe B: Amm...

Embodiment 7-12

[0041] A FeSiBCr / SiO 2 A method for preparing a nanocrystalline soft magnetic composite iron core, the method is carried out in the following steps:

[0042] (1) Add 50g of FeSiBCr amorphous powder and 300ml of absolute ethanol into a three-necked flask, mechanically stir (750r / min) at room temperature to disperse for 5min, add 50mL of ethanol / water solution (40mL of ethanol, the rest is deionized water) and continue to disperse After 15 minutes, the solution was placed in a constant temperature water bath and heated to 50°C; 3.4 g of silane coupling agent (APTES) was dissolved in absolute ethanol to prepare 50 mL of the solution and added to the solution in the three-necked flask to surface the FeSiBCr amorphous powder. modified to obtain FeSiBCr amorphous powder solution.

[0043] (2) Prepare tetraethyl orthosilicate / ethanol solution and ammonia water / water / ethanol solution, draw them into 50mL syringes A and B respectively (syringe A: tetraethyl orthosilicate X mL, balance...

Embodiment 13

[0050] A FeSiBCr / SiO 2 A method for preparing a nanocrystalline soft magnetic composite iron core, the method is carried out in the following steps:

[0051] (1) Add 50g of FeSiBCr amorphous powder and 300ml of absolute ethanol into a three-necked flask, mechanically stir (750r / min) at room temperature to disperse for 5min, add 50mL of ethanol / water solution (40mL of ethanol, the rest is deionized water) and continue to disperse After 15 minutes, the solution was placed in a constant temperature water bath and heated to 50°C; 3.4 g of silane coupling agent (APTES) was dissolved in absolute ethanol to prepare 50 mL of the solution and added to the solution in the three-necked flask to surface the FeSiBCr amorphous powder. modified to obtain FeSiBCr amorphous powder solution.

[0052] (2) Prepare tetraethyl orthosilicate / ethanol solution and ammonia / water / ethanol solution, draw them into 50mL syringes A and B respectively (syringe A: 10mL of tetraethyl orthosilicate, 40mL of ab...

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Abstract

The invention provides a FeSiBCr / SiO 2 The invention discloses a method for preparing a nanocrystalline soft magnetic composite iron core, which belongs to the technical field of powder metallurgy and soft magnetic materials. Firstly, the FeSiBCr amorphous powder with a purity of 99.0wt.% or more is used as the raw material, and the surface of the FeSiBCr amorphous powder particles is modified by using a silane coupling agent to improve the surface activity of the FeSiBCr amorphous particles, followed by chemical liquid phase in-situ deposition Process coated SiO on the surface of FeSiBCr magnetic particles 2 Insulating shell layer, combined with hot pressing and sintering, and stress relief annealing to prepare FeSiBCr / SiO with interparticle insulation 2 Nanocrystalline soft magnetic composite iron core. FeSiBCr / SiO prepared by the present invention 2 Nanocrystalline soft magnetic composite iron core exhibits excellent electromagnetic properties such as high magnetic induction, high resistivity, good frequency stability, low coercive force, and low iron loss, which can effectively fill the gap in the performance of existing soft magnetic composite materials .

Description

technical field [0001] The invention relates to the technical field of powder metallurgy and soft magnetic materials, in particular to a FeSiBCr / SiO 2 A method for preparing a nanocrystalline soft magnetic composite iron core. Background technique [0002] In the field of functional materials and structural materials, iron-based nanocrystalline soft magnetic composite materials have excellent soft magnetic properties such as high saturation magnetic induction, high magnetic permeability, low coercive force and low remanence, and their excellent mechanical properties , low cost and wide application prospects. At present, commercial iron-based soft magnetic composites are usually pressed from soft magnetic composite powders with a core-shell structure (ferromagnetic powder as the core and insulating coating agent as the shell). Therefore, the performance of the soft magnetic composite powder has an important influence on the performance of the iron-based soft magnetic compos...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): H01F41/02H01F1/153B22F1/00B22F3/14B22F3/24C22C38/32C22C38/34
CPCH01F41/0206H01F41/0246H01F1/15383H01F1/1535H01F1/15333B22F3/14B22F3/24C22C38/32C22C38/34B22F2003/248B22F2999/00B22F1/05B22F1/145B22F2201/00
Inventor 黄贞益樊希安刘莉先琛吴朝阳吴胜华
Owner ANHUI UNIVERSITY OF TECHNOLOGY
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