Permanent-magnet material resistant to high temperature and with high magnetic performance

Abstract

The invention discloses a permanent-magnet material resistant to high temperature and with high magnetic performance. The mass of the permanent-magnet material comprises 100 parts of Nd2Fe14B magnetic powder, 0.1-0.3 part of ferrocene magnetic powder, 0.1-5 parts of titanate coupling agent, 1-10 parts of bisphenol A epoxy resin and 0.2-3 parts of graphene oxide powder, and a cured material is formed after uniformly mixing the raw materials in a composite environment of a temperature field with a constant temperature being 20-200 DEG C and an orientation field with field magnetic intensity being 0.5-3T. With the permanent-magnet material provided by the invention, the defect of unfavorable temperature resistance of a bonded NdFeB material is improved, the application range of the bonded NdFeB material is expanded, the defect of low application temperature of the bonded NdFeB material can be made up, the magnetic performance of the magnet under high temperature is greatly improved, the weight loss of the magnet can be effectively reduced, and the corrosion resistance of the magnet is improved.

Description

technical field [0001] The invention relates to a rare earth permanent magnet material, which belongs to the technical field of materials, in particular to a permanent magnet material with high temperature resistance and high magnetic performance. Background technique [0002] The advantages of NdFeB magnets are high cost performance and good mechanical properties; the disadvantages are that the Curie temperature point is low, the temperature characteristics are poor, and it is easy to be pulverized and corroded. It must be adjusted by adjusting its chemical composition and adopting surface treatment methods. Improvement can meet the requirements of practical application. [0003] NdFeB magnets are divided into sintered type and bonded type according to different production methods. Compared with sintered permanent magnets, bonded magnets have many advantages such as high cost performance, convenient forming of special-shaped magnets, high processing precision, good toughne...

AI Technical Summary

Problems solved by technology

[0002] The advantages of NdFeB magnets are high cost performance and good mechanical properties; the disadvantages are that the Curie temperature point is low, the temperature characteristics are poor, and it is easy to be pulverized and corroded. It must be adjusted by adjusting its chemical composition and adopting surface treatment methods. To improve, in order to meet the requirements of practical application

[0004] In the existing technology, the Chinese invention patent CN101740193B, the title of the invention is: a high-performance high-resistivity rare earth permanent magnet and its preparation method. Started with technology, without adding insulating additives, studied the surface coupling process of magnetic powder, the mixing process of special resin and coupled magnetic powder, the orientation molding process of magnet temperature and pressure, etc., solved the problem of weak bonding between magnetic powder and special resin, special resin on the surface of magnetic powder There are a series of problems such as incomplete coating, easy agglomeration of special resin during processing, and limited improvement in magnetic properties of magnets after molding. From the results, it can be seen that the electrical insulation performance has indeed been significantly improved, but the high temperature resistance is not ideal. How? The development of high temperature resistant permanent magnet materials has become a development trend