High Curie temperature material and preparation method

A room temperature, concentration technology, applied in the direction of magnetic materials, inorganic material magnetism, metal material coating technology, etc., can solve the problem of insufficient Curie temperature, and achieve the effect of wide temperature application range, uniform organization, and strong structure

Active Publication Date: 2017-12-12
SHANXI RAY WHEAT ELECTRONICS TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, the Curie temperature of the material prepared by this method is not high enough to meet the current market demand.

Method used

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  • High Curie temperature material and preparation method

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Experimental program
Comparison scheme
Effect test

Embodiment 1

[0026] The preparation method of the high Curie temperature material of the present invention, the method comprises the following steps:

[0027] 1) According to the following mass percentage ingredients: Nd 22%, Ce 6.2%, Lu 0.6%, Gd 3.6%, B 3%, Yb 0.15%, In 0.45%, P 0.014%, Ni 0.45%, and the rest is Fe; Nd , Ce , Lu , Gd , Yb , In , Ni are added in the form of pure element, B is added in the form of iron-boron alloy containing 25% by mass of B, Si is added in the form of pure single crystal silicon, and P is added in the form of phosphorus with a mass fraction of 25%. % is added in the form of phosphorus-iron alloy, and the balance Fe is added in the form of pure metal;

[0028] 2) Add the above-mentioned prepared raw materials into the crucible in the vacuum induction furnace, heat to 1495°C, keep it warm for 25 minutes, then pour it into the ingot mold, and obtain the rare earth alloy ingot after natural cooling;

[0029] 3) The above-mentioned rare earth-containing alloy ...

Embodiment 2

[0035] The preparation method of the high Curie temperature material of the present invention, the method comprises the following steps:

[0036] 1) According to the following mass percentage ingredients: Nd 24%, Ce 8.8%, Lu 0.9%, Gd 4.4%, B7%, Yb 0.30%, In0.60%, P 0.04%, Ni 0.60%, and the rest is Fe; where Nd , Ce, Lu, Gd, Yb, In, Ni are added in the form of pure simple substance, B is added in the form of iron-boron alloy containing 25% by mass of B, Si is added in the form of pure single crystal silicon, and P is added in the form of phosphorus with a mass fraction of 25% Fe is added in the form of phosphorus-iron alloy, and the rest Fe is added in the form of pure metal;

[0037] 2) Add the above-mentioned prepared raw materials into the crucible in the vacuum induction furnace, heat to 1530°C, keep it warm for 25 minutes, then pour it into the ingot mold, and obtain the rare earth alloy ingot after natural cooling;

[0038] 3) The above-mentioned rare earth-containing al...

Embodiment 3

[0044] The preparation method of the high Curie temperature material of the present invention, the method comprises the following steps:

[0045] According to the following mass percentage ingredients: Nd 23%, Ce 7.5%, Lu 0.8%, Gd4.0%, B 5%, Yb 0.2%, In0.5%, P 0.025%, Ni 0.52%, the rest is Fe; other conditions And preparation process with embodiment one. The obtained magnetic material contains 0.07% N and 0.20% S by mass.

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Abstract

The invention provides a high-Curie-temperature material and a preparing method. The preparing method of the material comprise the following steps that burdening is conducted according to the following mass percent: 22%-24% of Nd, 6.2%-8.8% of Ce, 0.6%-0.9% of Lu, 3.6%-4.4% of Gd, 3%-7% of B, 0.15%-0.30% of Yb, 0.45%-0.60% of In, 0.01%-0.04% of P, 0.45%-0.60% of Ni and the balance Fe; the above matched raw materials are added in a crucible in a vacuum induction furnace and heated to the temperature ranging from 1,495 DEG C to 1,530 DEG C, heat preserving is conducted for 25 min, then the matched raw materials are poured in an ingot mold, and a rare-earth-containing alloy ingot is obtained after natural cooling; and the above rare-earth-containing alloy ingot is sequentially subjected to the tape preparing technology, the pretreatment technology, the nitriding powder preparing technology, the pressing forming technology and the sintering technology, and the high-Curie-temperature material is obtained.

Description

Technical field: [0001] The invention belongs to the field of metal materials and relates to a high Curie temperature material and a preparation method. Background technique: [0002] Application No. CN90109166.9 provides a kind of R 2 Fe 17 Nx, R(TiFe) 12 Nz, R(VFe) 12 Nz and other alloy-based rare earth-iron-nitrogen new permanent magnet alloys with high Curie temperature, high saturation magnetization, and high uniaxial magnetocrystalline anisotropy adopt a heat treatment process in a nitrogen atmosphere to make it absorb nitrogen. As the Curie temperature rises, the saturation magnetization increases, and at the same time, the anisotropy of the magnetocrystal undergoes a major change. Therefore, the nitrogen heat treatment process can be used as a means to manufacture a new type of rare earth-iron permanent magnet material with a high Curie temperature. [0003] The preparation process includes: smelting Nd (Ti, Fe) 12 alloy in an electric arc furnace or an induction...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C22C38/08C22C33/02C22C33/06C23C8/26B22F9/04H01F1/057H01F1/08
CPCB22F9/04B22F2009/043C22C33/0207C22C33/06C22C38/002C22C38/005C22C38/08C23C8/26H01F1/0571H01F1/0575
Inventor 孙锐卢俊丽孙学中
Owner SHANXI RAY WHEAT ELECTRONICS TECH
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