Magnetic material for replacing heavy rare earth elements

A technology of heavy rare earth elements and magnetic materials, applied in the direction of magnetic materials, magnetic objects, electrical components, etc., can solve the problem that the Curie temperature and coercivity of magnetic materials cannot be effectively improved, and achieve the improvement of Curie temperature and coercivity. force effect

Inactive Publication Date: 2013-03-20
NINGBO STAR MATERIALS HI TECH
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  • Abstract
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Problems solved by technology

However, simply adding fluoride can not effectively improve the Curie tem

Method used

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Example Embodiment

[0010] The technical solutions of the present invention will be described in detail below through specific embodiments.

[0011] First, make samarium-iron magnets, that is, select 6.2% samarium, 2.1% yttrium, 1.1% thorium, 3.2% zinc, 8.7% nickel, 1.0% nitrogen and the balance iron according to the material composition to smelt, and then After crushing, the amount of the crushed samarium iron powder is the same as the amount of ammonium fluoride powder and mixed thoroughly, then put it into a sealed container and heated at a heating temperature of 150-200℃, which is produced by decomposition of ammonium fluoride The fluorine converts part of the nitrogen and keeps the temperature for 24-48 hours, and then cools, keeping the cooling rate at a constant rate of 1.2°C per minute, which can ensure the volume expansion of the same part of the alloy and increase the magnetic moment of iron.

[0012] The prepared magnetic powder was processed into a magnet and analyzed. The Curie temperatur...

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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...

Claims

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Application Information

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IPC IPC(8): H01F1/053C22C38/00
Inventor 潘道良关井和苏广春
Owner NINGBO STAR MATERIALS HI TECH
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