Magnetic material for replacing heavy rare earth elements

Abstract

The invention relates to a magnetic material for replacing heavy rare earth elements. The magnetic material comprises the following components by atomic percent: 6.2% of samarium, 2.1% of yttrium, 2.7% of fluorine, 1.1% of thorium, 3.2% of zinc, 8.7% of nickel, 1.0% of nitrogen and the balance of iron. A crystal structure in the material is more effectively controlled by adjusting the content of fluorine in the magnetic material and adding the light rare earth element yttrium into the material, and the Curie temperature and coercive force of the magnetic material are effectively increased.

Description

technical field [0001] The invention belongs to the field of magnetic materials, in particular to a magnetic material replacing heavy rare earth elements. Background technique [0002] The most commonly used permanent magnetic materials are neodymium-iron magnetic materials and samarium-iron magnetic materials, but the Curie temperature of these two types of permanent magnetic materials is not high, generally below 130°C, and the magnetic flux density is not high at the same time, because these two types of permanent magnetic materials There are defects in the crystallization process of magnetic-like materials, resulting in low coercive force. [0003] In the current technology, the coercive force is generally increased by adding rare earth elements, and at the same time, in order to increase the Curie temperature, it is generally necessary to add heavy rare earth elements such as terbium and dysprosium, resulting in increased production costs. In order to improve the Curie...

AI Technical Summary

Problems solved by technology

However, simply adding fluoride can not effectively improve the Curie temperature and coercive force of these magnetic materials through analysis.