High-iron-content samarium-cobalt permanent magnet material and preparation method

A technology of permanent magnet material and content, applied in the direction of magnetic material, inorganic material magnetism, magnetic object, etc., can solve the problem of poor squareness of samarium cobalt permanent magnet, and achieve the effect of improving magnetic field, reducing cost and high magnetic energy product
CN107895620AActive Publication Date: 2018-04-10BEIHANG UNIV
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Patent Information

Authority / Receiving Office
CN · China
Current Assignee / Owner
BEIHANG UNIV
Publication Date
2018-04-10

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Abstract

The invention provides a high iron content samarium cobalt permanent magnet material and preparation method. The expression of the high-iron-content samarium-cobalt permanent magnetic material is Sm1-pMp(Co1-x-y-wFexCuyZrw)z, where M is at least one of the selected elements Pr, La, Ce, Nd, Y, Dy, and Er, p=0.02 to 0.15, x=0.28 to 0.36, y=0.04 to 0.08, w=0.015 to 0.025, z=7.5 to 8.2, and z is an atomic ratio of a transition metal to a rare earth metal. The invention adopts a multi-step sintering process to improve the squareness of the high-iron-content Sm1-pMp (Co1-x-y-wFexCuyZrw) z permanentmagnet material, and solves the problem that the decrease of the squareness of the iron content leads to the decrease of the magnetic performance. The goal of increasing the maximum energy product byincreasing the Fe content has been achieved. The magnetic properties were as follows: remanence Br = 11.18-12.07 kGs, the maximum energy product (BH) max = 28 - 34 MGOe, the square degree Hk / Hcj = 0.311 - 0.504, and the coercive force Hcj = 21.32 - 26.94 kOe.
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Description

technical field

[0001] The invention relates to the technical field of magnetic materials, in particular to a samarium cobalt permanent magnet material with high iron content and a preparation method thereof, which improves the squareness of the samarium cobalt permanent magnet material with high iron content. Background technique

[0002] As an important functional material, permanent magnet materials have been widely used in various important fields such as computer technology, micro-communication technology, automobile industry, aviation industry, automation technology, and instrument technology. The 2:17 type samarium cobalt permanent magnet material has high saturation magnetization, high coercivity, high Curie temperature and good corrosion resistance, making it the best choice for permanent magnet materials in many industries. As the demand for clean energy is becoming more and more urgent, the high-performance permanent magnets required in wind turbines have also rec...

Claims

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