Sm2Co17 type rare earth permanent magnet material and preparation method thereof

A rare-earth permanent magnet and heavy rare-earth technology, which is applied in the manufacture of inductors/transformers/magnets, magnetic materials, magnetic objects, etc., can solve the problems of long process cycle and large energy consumption, achieve high interface energy, expand the design range, and enrich The effect of the interface

Active Publication Date: 2021-10-22
CENT SOUTH UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

The above-mentioned prior art has the defects of long process cycle and high energy consumption, and at the same time, the magnetic properties may be further improved

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0076] Embodiment 1: (corresponding to Comparative Example 1)

[0077] Step 1: Preparation of sintered compact of samarium-cobalt-based rare earth permanent magnet material

[0078] The process is the same as Comparative Example 1. However, after being kept at 1201°C for 2 hours, the sintered billet was obtained after being air-cooled and released from the furnace.

[0079] The second step: microwave solution treatment

[0080] Put the sintered billet and the auxiliary heating material SiC into the insulation cavity made of multi-layer alumina fiber board, place the whole in the microwave sintering furnace cavity, and pump the microwave sintering furnace cavity to a vacuum degree higher than 0.1Pa, and then pass in high-purity argon gas. The sample was heated to a solid solution temperature of 1180 °C at a rate of 25 °C / min and held for 2 hours, then the heating power of the microwave heat treatment furnace was turned off, and the temperature was rapidly cooled to a tempera...

Embodiment 2

[0085] Step 1: Preparation of sintered compact of samarium-cobalt-based rare earth permanent magnet material

[0086] The process is the same as that of Comparative Example 2, except that the sample is kept at 1215° C. for 2 hours and then air-cooled to obtain a sintered compact.

[0087] The second step: microwave solution treatment

[0088] Put the sintered billet and the auxiliary heating material SiC into the insulation cavity made of multi-layer alumina fiber board, place the whole in the microwave sintering furnace cavity, and pump the microwave sintering furnace cavity to a vacuum degree higher than 0.1Pa, and then pass in high-purity argon gas. The sample was heated at a rate of 90°C / min to a solid solution temperature of 1190°C and held for 2 hours, then the heating power of the microwave heat treatment furnace was turned off, and the sample was rapidly cooled by gas quenching until the temperature was lower than 150°C to obtain a microwave solid solution body.

[0...

Embodiment 3

[0093] Step 1: Preparation of sintered compact of samarium-cobalt-based rare earth permanent magnet material

[0094] The process is the same as that of Comparative Example 3, except that the sample is kept at 1210° C. for 2 hours and then air-cooled to obtain a sintered billet.

[0095] The second step: microwave solution treatment

[0096] Put the sintered billet and the auxiliary heating material SiC into the insulation cavity made of multi-layer alumina fiber board, place the whole in the cavity of the microwave sintering furnace, and pump the vacuum of the cavity of the microwave sintering furnace to a degree higher than 0.1Pa, and then introduce high-purity argon gas. The sample was heated at a rate of 90°C / min to a solid solution temperature of 1180°C and held for 1 hour, then the heating power of the microwave heat treatment furnace was turned off, and the sample was rapidly cooled by gas quenching until the temperature was lower than 150°C to obtain a microwave solid...

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Abstract

The invention relates to a Sm2Co17 type rare earth permanent magnet material and a preparation method thereof. The Sm2Co17 type rare earth permanent magnet material consists of the following components in percentage by mass: Sm, heavy rare earth, Co, Fe, Cu and Zr. The preparation method comprises the following steps: preparing a samarium cobalt-based rare earth permanent magnet material sintered blank, heating the sintered blank to 1150-1200 DEG C by adopting microwaves at a heating speed of 15-90 DEG C/min in a protective atmosphere, carrying out solid solution and heat preservation, rapidly cooling by circulating gas to obtain a microwave solid solution blank, heating the solid solution blank to 820-880 DEG C by adopting microwaves at a heating speed of 15-90 DEG C/min, carrying out aging and heat preservation for 20-170min, and cooling. The method is reasonable in process design and convenient to operate, the preparation period of the Sm2Co17 type rare earth permanent magnet material can be greatly shortened, the prepared Sm2Co17 type rare earth permanent magnet material is better in magnetic performance, and remarkable industrial application value and economic benefits are achieved.

Description

Technical field: [0001] The invention relates to the technical field of magnetic materials, in particular to a Sm 2 co 17 Type rare earth permanent magnet material and preparation method thereof. Background technique: [0002] With the progress of human civilization, the demand for high-performance permanent magnet materials in modern society is increasing day by day, especially the rapid development of the electronic industry has put forward higher and higher requirements for the performance of permanent magnet materials. Rare earth permanent magnet materials were gradually developed between 1950 and 1975. In 1967, Strnat and others first used powder metallurgy to manufacture the first YCo 5 Bonded permanent magnet materials. Then Strnat et al. used the same method to develop SmCo 5 Permanent magnet, its magnetic properties are: B r =0.51T,H ci =23.7kA / m, (BH) max =40.2kJ / m 3 . It was later found that high-performance Sm can be prepared by substituting part of Fe ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H01F1/055H01F41/02
CPCH01F1/0551H01F1/0556H01F1/0557H01F41/0266
Inventor 李丽娅葛毅成高智朱生志
Owner CENT SOUTH UNIV
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