Nanocrystalline soft magnetic alloy material

A nanocrystalline soft magnetic and alloy material technology, applied in the direction of magnetic materials, magnetic objects, electrical components, etc., can solve the problems of shape and size limitations, long time, poor performance of soft magnetic alloys, etc.

Inactive Publication Date: 2013-02-13
顾建
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

The nanocrystalline soft magnetic alloy materials currently used in practice are usually prepared by amorphous crystallization, and their shape and size are greatly limited. To obtain large nanocrystalline soft magnetic materials, the amorphous alloy must be crushed and then sintered.
However, usually the sintering temperature is high, the time is long, and the obtained grains are long, resulting in poor performance of soft magnetic alloys

Method used

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Examples

Experimental program
Comparison scheme
Effect test

preparation example Construction

[0021] A method for preparing a nanocrystalline soft magnetic alloy material, comprising the steps of:

[0022] 1), preparing iron-X master alloy, in the iron-X master alloy, X accounts for 15% by weight of the master alloy;

[0023] 2), iron, cobalt, copper, boron and the intermediate alloy of step 1) are batched according to atomic percentage, and the alloy ingot is obtained through melting and cooling in an arc heating furnace at 1000-1300 °C;

[0024] 3) Cutting the alloy ingot obtained in step 2) to obtain an amorphous thin strip, and subjecting the thin strip to heat treatment at 250-450°C for 1-2 hours and then pulverizing, the pulverized particle size is 20-40nm ;

[0025] 4) Put the pulverized powder in step 3) into a mold, and sinter at 50-55MPa and 750-780°C for 8-8.5 minutes.

Embodiment 1

[0027] Calculate the amount of required constituent elements, select iron, cobalt, copper, and boron with a purity of about 99.5-99.9%, and make an intermediate alloy with X and iron according to the standard that X accounts for 15% by weight of X and iron, and the intermediate The alloy is processed into a block; the selected atomic composition percentage is: 43% iron, 43% cobalt, 0.8% copper, 6.5% boron, 4% X; the X includes niobium, samarium and gadolinium; The percentage ratio of niobium, samarium and gadolinium by atomic composition is 2.5:1:1; the percentage ratio of iron and cobalt by atomic composition is 1:1. Iron, cobalt, copper, boron and intermediate alloys are mixed according to atomic percentage, melted and cooled in an arc heating furnace at 1000-1300°C to obtain an alloy ingot; the obtained alloy ingot is cut to obtain an amorphous thin strip, and The ribbon is pulverized after heat treatment at 450°C for 2 hours, and the pulverized particle size is 20-40nm; th...

Embodiment 2

[0029] Calculate the amount of required constituent elements, select iron, cobalt, copper, and boron with a purity of about 99.5-99.9%, and make an intermediate alloy with X and iron according to the standard that X accounts for 15% by weight of X and iron, and the intermediate The alloy is processed into block shape; the selected atomic composition percentage is: 43.5% iron, 43.5% cobalt, 1.2% copper, 7.5% boron, 5% X; said X includes niobium, samarium and gadolinium; The percentage ratio of niobium, samarium and gadolinium by atomic composition is 2.5:1:1; the percentage ratio of iron and cobalt by atomic composition is 1:1. Iron, cobalt, copper, boron and intermediate alloys are mixed according to atomic percentage, melted and cooled in an arc heating furnace at 1000-1300°C to obtain an alloy ingot; the obtained alloy ingot is cut to obtain an amorphous thin strip, and The ribbon is pulverized after heat treatment at 400°C for 2 hours, and the pulverized particle size is 20...

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Abstract

The invention relates to a nanocrystalline soft magnetic alloy material. By the total atomic weight of each composition element, the composition ingredients in percentage by atomic composition are as follows: 43-43.5% of iron, 43-43.5% of cobalt, 0.8-1.2% of copper, 6.5-7.5% of boron, and 4-5% of X, wherein X comprises niobium, samarium and gadolinium.

Description

technical field [0001] The invention belongs to the technical field of magnetic functional materials, in particular to a nanocrystalline soft magnetic alloy material. Background technique [0002] Soft magnetic materials are widely used in the field of magnetic materials due to their small coercive force and easy magnetization and demagnetization, such as computers, mobile phones, flat-panel display technology, etc., as well as various magnetic amplifiers, filter coils, variable frequency inductors, variable frequency transformers, inverters, etc. In variable power supply, energy storage inductor and other devices. [0003] The current soft magnetic materials are mainly ferrite soft magnetic materials, which have a low Curie temperature. When the temperature is above 100°C, the saturation magnetic induction decreases significantly, so the temperature range of its use is limited; moreover, its saturation magnetic induction is low. , limiting its promotion in miniaturization ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C22C30/02C22C45/00C22C1/03H01F1/147
Inventor 顾建
Owner 顾建
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