Looking for breakthrough ideas for innovation challenges? Try Patsnap Eureka!

Neodymium-iron-boron permanent magnet material, and raw material composition, preparation method and application thereof

A technology of raw material composition and permanent magnet materials, applied in the direction of magnetic materials, magnetic objects, inductors/transformers/magnets, etc., can solve the problems of not being able to guarantee magnetic properties, anti-demagnetization properties and heat treatment temperature zones at the same time

Pending Publication Date: 2020-08-28
FUJIAN CHANGJIANG GOLDEN DRAGON RARE EARTH CO LTD
View PDF3 Cites 4 Cited by
  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0006] The technical problem to be solved by the present invention is to overcome the defect that the NdFeB permanent magnet material in the prior art cannot guarantee the magnetic properties, anti-demagnetization properties and heat treatment temperature zone at the same time, and provide a NdFeB permanent magnet material, a raw material composition, Preparation method and application

Method used

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
View more

Image

Smart Image Click on the blue labels to locate them in the text.
Viewing Examples
Smart Image
  • Neodymium-iron-boron permanent magnet material, and raw material composition, preparation method and application thereof
  • Neodymium-iron-boron permanent magnet material, and raw material composition, preparation method and application thereof
  • Neodymium-iron-boron permanent magnet material, and raw material composition, preparation method and application thereof

Examples

Experimental program
Comparison scheme
Effect test

preparation example Construction

[0163] The preparation method of NdFeB permanent magnet material is as follows:

[0164] In the examples and comparative examples of the present invention, the introduced carbon impurity and oxygen impurity contents are conventional in the art.

[0165] (1) Melting and casting process: according to the formula in Table 1, put the prepared raw materials in Table 1 into an alumina crucible, and carry out vacuum melting in a high-frequency vacuum melting furnace with a vacuum of 0.05Pa and 1500°C . The argon gas is introduced into the high-frequency vacuum induction quick-setting belt furnace for casting, and then the alloy is quenched to obtain an alloy sheet with a thickness of 0.3 mm.

[0166] (2) Hydrogen crushing process: Vacuumize the hydrogen crushing furnace where the quenched alloy is placed at room temperature, and then pass hydrogen gas with a purity of 99.9% into the hydrogen crushing furnace to maintain the hydrogen pressure at 90kPa. After fully absorbing hydrogen ...

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
Login to View More

PUM

PropertyMeasurementUnit
Thicknessaaaaaaaaaa
Particle sizeaaaaaaaaaa
Login to View More

Abstract

The invention discloses a neodymium-iron-boron permanent magnet material, and a raw material composition and a preparation method thereof. The raw material composition for preparing the neodymium ironboron permanent magnet material comprises the following components: 0.25-0.5 mass percent of Nb and 0.55-0.8 mass percent of Cu. The squareness of the neodymium-iron-boron permanent magnet material prepared from the raw material composition is 99% or above. The absolute values of the temperature coefficients of Hcj at the temperature of 20-150 DEG C are all 0.422% or below; the heat treatment temperature zone is 470-510 DEG C; Br is greater than or equal to 14kGs, and the coercive force is greater than or equal to 25kOe.

Description

technical field [0001] The invention relates to a neodymium-iron-boron permanent magnet material, its raw material composition, its preparation method and application. Background technique [0002] Permanent magnetic materials have been developed as key materials supporting electronic devices, and the development direction is toward the direction of high magnetic energy product and high coercive force. R-T-B series permanent magnet materials (R is at least one of the rare earth elements) are known as the magnets with the highest performance among permanent magnets, and are used in voice coil motors (VCM) of hard disk drives, electric vehicles (EV, HV, PHV) etc.) motors, industrial equipment motors and other motors and home appliances. [0003] In the prior art, one of the technical problems faced: when the content of high-melting point metals, such as Nb, Ti and Zr, etc. is low, sintering will be difficult, and the coercive force of the magnet will decrease. However, when ...

Claims

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
Login to View More

Application Information

Patent Timeline
no application Login to View More
IPC IPC(8): H01F1/057H01F41/02C22C38/16C22C38/10C22C38/14C22C38/06C22C33/02
CPCH01F41/0266H01F1/0576H01F1/0577H01F41/0293C22C38/005C22C38/16C22C38/10C22C38/14C22C38/06C22C38/002C22C33/0278
Inventor 蓝琴黄佳莹牟维国
Owner FUJIAN CHANGJIANG GOLDEN DRAGON RARE EARTH CO LTD
Who we serve
  • R&D Engineer
  • R&D Manager
  • IP Professional
Why Patsnap Eureka
  • Industry Leading Data Capabilities
  • Powerful AI technology
  • Patent DNA Extraction
Social media
Patsnap Eureka Blog
Learn More
PatSnap group products

Browse by: Latest US Patents, China's latest patents, Technical Efficacy Thesaurus, Application Domain, Technology Topic, Popular Technical Reports.

© 2024 PatSnap. All rights reserved.Legal|Privacy policy|Modern Slavery Act Transparency Statement|Sitemap|About US| Contact US: help@patsnap.com