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Nanocrystalline misch metal permanent magnet and preparation method and application thereof

A mixed rare earth and permanent magnet technology, applied in the fields of magnetic objects, inductance/transformer/magnet manufacturing, magnetic materials, etc., can solve the problem of less research on nanocrystalline anisotropic MMCo magnets, and achieve environmental protection and simplification. The effect of the preparation process, ensuring uniformity and consistency

Inactive Publication Date: 2018-08-03
INST OF PHYSICS - CHINESE ACAD OF SCI
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Currently, about nanocrystalline anisotropic MMCo 5 Magnets are less studied

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0038] 1) According to the chemical formula MMCo 5 Preparation of raw materials, in which MM adds 2% additional burning loss ratio, and the prepared raw materials are melted into alloy ingots by arc under the protection of argon, and smelted repeatedly for 3 times to ensure the uniformity of alloy ingots;

[0039] 2) MMCo was synthesized by surfactant-assisted multi-step ball milling method 5 The alloy ingot is ball-milled into nano-sized particles; the organic solvent in the first stage is ethanol, the ball milling speed is 100rpm, and the time is 5 hours. In the second stage, a surfactant oleic acid needs to be added, and the dosage is 5% of the mass of the magnetic material. The speed is 200rpm, and the time is 8 hours, and the ball milling speed of the third stage is 300rpm, and the time is 3 hours;

[0040] 3) Put the air-dried ball mill powder into a cemented carbide mold under the protection of an inert gas, put it into a hot isostatic press, and press it for 0.5 hours...

Embodiment 2

[0046] 1) According to the chemical formula MMCo 5 Preparation of raw materials, in which MM adds 2% additional burning loss ratio, and the prepared raw materials are melted into alloy ingots by arc under the protection of argon, and smelted repeatedly for 3 times to ensure the uniformity of alloy ingots;

[0047] 2) MMCo was synthesized by surfactant-assisted multi-step ball milling method 5 The alloy ingot is ball-milled into nano-sized particles; the organic solvent in the first stage is ethanol, the ball milling speed is 100rpm, and the time is 5 hours. In the second stage, a surfactant oleic acid needs to be added, and the dosage is 5% of the mass of the magnetic material. The speed is 200rpm, and the time is 8 hours, and the ball milling speed of the third stage is 300rpm, and the time is 3 hours;

[0048] 3) Put the air-dried ball mill powder into a cemented carbide mold under the protection of an inert gas, put it into a hot isostatic press, and press it for 0.5 hours...

Embodiment 3

[0054] 1) According to the chemical formula MMCo 5 Preparation of raw materials, in which MM adds 2% additional burning loss ratio, and the prepared raw materials are melted into alloy ingots by arc under the protection of argon, and smelted repeatedly for 3 times to ensure the uniformity of alloy ingots;

[0055] 2) MMCo was synthesized by surfactant-assisted multi-step ball milling method 5 The alloy ingot is ball-milled into nano-sized particles; the organic solvent in the first stage is ethanol, the ball milling speed is 100rpm, and the time is 5 hours. In the second stage, a surfactant oleic acid needs to be added, and the dosage is 5% of the mass of the magnetic material. The speed is 200rpm, and the time is 8 hours, and the ball milling speed of the third stage is 300rpm, and the time is 3 hours;

[0056] 3) Put the air-dried ball mill powder into a cemented carbide mold under the protection of an inert gas, put it into a hot isostatic press, and press it for 0.5 hours...

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Abstract

The invention provides a nanocrystalline misch metal permanent magnet and a preparation method and application thereof. A chemical formula of the permanent magnet is MMCo5, wherein MM is a misch metalalloy extracted from co-associated and primary light rare earth ores in the process of purification, containing impurities and having natural element proportion. A main phase of a permanent magnet material has a hexagonal structure of CaCu5 type. The intrinsic coercive force Hcj of the permanent magnetic material is greater than or equal to 4kOe, the residual magnet Br is greater than or equal to3kGs, and the maximum magnetic energy product (BH) Max is greater than or equal to 5MGOe. Co-associated and primary misch metal raw materials which are not subject to rare earth purification treatment are adopted to prepare a cobalt-based permanent magnet, and the permanent magnet is applied to a special environment. Therefore, a raw material process is simple, energy and resource consumption islow, the prices is low, and environmental protection and balanced utilization of rare earth resources are facilitated. The nanocrystalline MMCo5 permanent magnet has good magnetic property, heat stability, corrosion resistance properties and mechanical property.

Description

technical field [0001] The invention relates to a nanocrystalline mixed rare earth permanent magnet, a preparation method and application thereof, and belongs to the technical field of rare earth permanent magnets. Background technique [0002] Rare earth permanent magnet material is a kind of permanent magnet material with the intermetallic compound formed by rare earth metal elements and transition group metal elements as the main phase of the matrix. It is a permanent magnet material with the highest comprehensive performance known now. Among them, the rare earth cobalt-based permanent magnet alloy has good high-temperature magnetic properties and can meet the service requirements under special conditions. It has great application prospects in the fields of aerospace, military industry and national defense, and has become an important function to promote the development of productivity and social progress. Material. However, with the rapid development of automation, info...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H01F1/058H01F1/06H01F41/02
CPCH01F1/058H01F1/068H01F41/0266
Inventor 熊杰夫赵鑫沈保根赵同云李锐胡凤霞孙继荣
Owner INST OF PHYSICS - CHINESE ACAD OF SCI
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