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

A kind of sintered silver-containing cerium-rich yttrium neodymium-iron-boron permanent magnet and its preparation method

A permanent magnet, NdFeB technology, applied in the direction of magnetic objects, inductors/transformers/magnet manufacturing, magnetic materials, etc., can solve the problems of performance degradation, achieve the effect of improving microstructure, improving comprehensive magnetic properties, and meeting market demand

Active Publication Date: 2019-01-22
BAOTOU JINSHAN MAGNETIC MATERIAL
View PDF8 Cites 0 Cited by
  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0005] The purpose of this invention is to solve the problem that the application of rare earth elements in the market is seriously unbalanced and the performance is reduced after adding high-abundance rare earth elements. The cost is reduced by adding cerium and yttrium elements, and the thermal conductivity of the cast sheet is improved by adding silver. Strong magnetic heat treatment, improving the grain boundary phase of the magnet microstructure, and preparing high-performance sintered silver-containing cerium-rich NdFeB permanent magnets

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
  • A kind of sintered silver-containing cerium-rich yttrium neodymium-iron-boron permanent magnet and its preparation method
  • A kind of sintered silver-containing cerium-rich yttrium neodymium-iron-boron permanent magnet and its preparation method
  • A kind of sintered silver-containing cerium-rich yttrium neodymium-iron-boron permanent magnet and its preparation method

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0023] Embodiment 1 A kind of sintered silver-containing cerium-rich yttrium neodymium-iron-boron permanent magnet, its mass percent chemical formula general formula is: (Ce 20 Y 1 Nd 79 ) 30.8 [Fe 98 (Co 0.2 Ag 0.1 Cu 0.1 al 0.5 Nb 0.1 ) 2 ] 68.2 B 1 , and Ag accounts for 10% of the Mc content.

[0024] The preparation method of the above-mentioned sintered silver-containing cerium-rich yttrium neodymium-iron-boron permanent magnet is carried out as follows:

[0025] (1) Raw material preparation: prepare raw materials according to the design composition.

[0026] (2) Quick-setting cast sheet: under argon filling pressure ≤3×10 4 The slabs were cast in the quick-setting casting furnace of Pa, the casting temperature was 1420°C, the speed of the quick-setting copper roll was 41r / min, and the slabs with a thickness of 0.15-0.3mm were obtained.

[0027] (3) Hydrogen crushing and jet milling: adopting hydrogen crushing and jet milling anaerobic process to make the ca...

Embodiment 2

[0033] Embodiment 2 A kind of sintered silver-containing cerium-rich yttrium neodymium-iron-boron permanent magnet, its mass percent chemical formula general formula is: (Ce 30 Y 0.5 Nd 69.5 ) 30.8 [Fe 98 (Co 0.2 Ag 0.1 Cu 0.1 al 0.5 Nb 0.1 ) 2 ] 68.2 B 1 , and Ag accounts for 10% of the Mc content.

[0034] The preparation method of the above-mentioned sintered silver-containing cerium-rich yttrium-iron-boron permanent magnet is exactly the same as that of Example 1. To obtain a permanent magnet, proceed at 20 °C Cylindrical test, measuring remanence (Br), coercive force (Hcb), intrinsic coercive force (Hcj), magnetic energy product ((BH)max), J on the demagnetization curve of the magnet = 0.9J r When the reverse magnetic field (Hk) and squareness (Hk / Hcj) are obtained, the data shown in the following table are obtained:

[0035]

[0036] 2

Embodiment 3

[0037] Embodiment 3 A kind of sintered silver-containing cerium-rich yttrium neodymium-iron-boron permanent magnet, its mass percent chemical formula general formula is: (Ce 20 Nd 80 ) 30.8 [Fe 98 (Co 0.2 Ag 0.1 Cu 0.1 al 0.5 Nb 0.1 ) 2 ] 68.2 B 1 , and Ag accounts for 10% of the Mc content.

[0038] The preparation method of the above-mentioned sintered silver-containing cerium-rich yttrium-iron-boron permanent magnet is exactly the same as that of Example 1. To obtain a permanent magnet, proceed at 20 °C Cylindrical test, measuring remanence (Br), coercive force (Hcb), intrinsic coercive force (Hcj), magnetic energy product ((BH)max), J on the demagnetization curve of the magnet = 0.9J r When the reverse magnetic field (Hk) and squareness (Hk / Hcj) are obtained, the data shown in the following table are obtained:

[0039]

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
densityaaaaaaaaaa
Login to View More

Abstract

The invention relates to a sintered silver-containing cerium-yttrium-rich neodymium iron boron permanent magnet and a preparation method thereof. The permanent magnet has the general chemical formulabased on mass percentage as follows: (CeYNd<100-a-b>)<x>(Fe<100-c>M<c>)<100-x-y>B<y>, wherein a is greater than or equal to 5 and less than or equal to 30; b is greater than or equal to 0.3 andless than or equal to 2; c is greater than or equal to 0.5 and less than or equal to 5; x is greater than or equal to 28.8 and less than or equal to 32.5; y is greater than or equal to 0.9 and less than or equal to 1.1, wherein M is selected from one or several kinds of metal elements of Ga, Si, Ti, Mn, Ni, Sn, Co, Cu, Al, Nb, Zr and Ag. The preparation method of the sintered silver-containing cerium-yttrium-rich neodymium iron boron permanent magnet comprises the steps of performing raw material preparation, rapid hardening and piece casting, hydrogen decrepition, airflow milling, orientationand forming, isostatic pressing, sintering and heat treatment. By adjusting the formula, adding abundant Ce and Y rare earth elements, adding a certain content of Ag to improve the heat conductivityof the Ce magnet cast piece, and by adopting strong magnetic two-stage heat treatment in the sintering stage, the sintered silver-containing cerium-yttrium-rich neodymium iron boron permanent magnet with relatively high comprehensive performance can be obtained, the production cost of an enterprise is lowered, and comprehensive utilization of rare earth resources can be realized.

Description

technical field [0001] The invention relates to the technical field of rare earth permanent magnet materials, in particular to a sintered silver-containing cerium-rich yttrium neodymium-iron-boron permanent magnet with low cost, good thermal conductivity and high comprehensive magnetic properties and a preparation method thereof. Background technique [0002] Sintered Nd-Fe-B permanent magnets are widely used in nuclear magnetic resonance, high-performance micro-motors, electric vehicles, aerospace navigators, wind power, office automation, home appliances, etc. due to their high comprehensive magnetic properties and relatively low prices. field. With the increasing market demand and the rapid update of the preparation process, a large amount of PrNd required for the preparation of magnets has been consumed, while the utilization rate of relatively abundant Ce, La, and Y is low, resulting in an unbalanced application of various rare earth elements. In addition, the recent T...

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
Patent Type & Authority Patents(China)
IPC IPC(8): H01F1/057H01F1/08H01F41/02C22C33/02C21D1/04
CPCC21D1/04C22C33/0278H01F1/0577H01F41/0246
Inventor 夏峰王瑜李艳丽郑海龙魏星孙彩娜冯永怀孙伟李双威刘吉祥
Owner BAOTOU JINSHAN MAGNETIC MATERIAL
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