Agglutinate neodymium-iron-boron magnet and preparation method thereof

A neodymium iron boron and magnet technology, used in magnetic objects, inductance/transformer/magnet manufacturing, magnetic materials, etc., can solve problems such as process and product performance defects, mechanical performance deterioration, etc., to achieve favorable mechanical strength, mold release and The effect of good dimensional precision

Inactive Publication Date: 2010-12-22
MAGNEQUENCH (TIANJIN) CO LTD
View PDF2 Cites 1 Cited by
  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

In Japanese Patent Application No. 2000-036403, in order to avoid the deterioration of mechanical properties caused by metal soaps and amino acid lubricants, fluororesins are proposed for replacement lubricants, and do not melt when the green body is subjected to heat curing treatment, so It has the advantage of preventing the deterioration of the mechanical strength of the obtained product, but there are defects in the process and product performance

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
  • Agglutinate neodymium-iron-boron magnet and preparation method thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0012] Weigh MQP-B 80mesh magnetic powder 10,000g, EPON 840 bisphenol A epoxy resin (epoxy equivalent EEW=330-380) 100g, dicyandiamide 3.662g, 3-(3,3-dichlorophenyl)-1 , 1-dimethylurea 1.831g, Wacker H 20 Silica 20g, acetone 1000g, the above-mentioned components are prepared into resin solution, mixed with planetary mixer for 15 minutes under nitrogen environment, dried under 55 degrees Celsius for 120 minutes with blast oven, removed acetone, and obtained containing nano-silica magnetic powder - Resin mix. Use Lakeshore 7312 VSM (Vibrating Sample Magnetometer) tester to test the magnetic properties of the obtained magnetic powder-resin mixture; use YA-20 electro-hydraulic pressure testing machine to examine the demoulding force of the obtained magnetic powder-resin mixture; use Gasbarre 15T press at 14ton / cm 2 Pressed under pressure into a ring magnet green body with an outer diameter of 20.80mm and an inner diameter of 18.60mm; cured at a constant temperature of 170 degre...

Embodiment 2

[0014] Weigh MQP-B 80mesh magnetic powder 10,000g, EPON 840 bisphenol A epoxy resin (EEW=330-380) 100g, dicyandiamide 3.662g, 3-(3,3-dichlorophenyl)-1,1- Dimethylurea 1.831g, Wacker H 20 10 g of silicon dioxide, 1000 g of tetrahydrofuran, the above-mentioned components are prepared into a resin solution, mixed with a planetary mixer for 15 minutes in a nitrogen environment, and dried for 120 minutes under a condition of 65 degrees Celsius in a blast oven to remove the tetrahydrofuran to obtain nano-silica reinforced. Magnetic powder-resin mixture. The magnetic properties of the obtained magnetic powder-resin mixture were tested by a Lakeshore7312 VSM (Vibrating Sample Magnetometer) tester; the demolding force of the obtained magnetic powder-resin mixture was investigated by a YA-20 electro-hydraulic pressure testing machine; a Gasbarre 15T press was used at 14ton / cm 2 Pressed under pressure into a ring magnet green body with an outer diameter of 20.80mm and an inner diamete...

Embodiment 3

[0016] Weigh MQP-B 80mesh magnetic powder 10,000g, EPON 840 bisphenol A epoxy resin (EEW=330-380) 100g, dicyandiamide 3.662g, 3-(3,3-dichlorophenyl)-1,1- Dimethylurea 1.831g, Wacker H 20 Silica 3g, acetone: tetrahydrofuran=1:1 wt% mixed solution 1000g, the above components were prepared into resin solution, mixed for 15 minutes with a planetary mixer under a nitrogen environment, and dried under a blast oven at 60 degrees Celsius for 120 minutes to remove solvent to obtain a nano-silica reinforced magnetic powder-resin mixture. Use Lakeshore 7312 VSM (Vibrating Sample Magnetometer) tester to test the magnetic properties of the obtained magnetic powder-resin mixture; use YA-20 electro-hydraulic pressure testing machine to examine the demoulding force of the obtained magnetic powder-resin mixture; use Gasbarre 15T press at 14ton / cm 2 Pressed under pressure into a ring magnet green body with an outer diameter of 20.80mm and an inner diameter of 18.60mm; cured at a constant tem...

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
particle sizeaaaaaaaaaa
specific surface areaaaaaaaaaaa
specific surface areaaaaaaaaaaa
Login to view more

Abstract

The invention relates to a Nd-Fe-B bonded magnet, which comprises Nd-Fe-B magnetic powder, thermosetting resin, a curing agent, an accelerant and a lubricant, and is characterized in that nano silicon dioxide is added to the Nd-Fe-B bonded magnet as a reinforcing agent, the content of the added weight is 0.01 to 1.0 percent of the weight of the magnetic powder, the thermosetting resin, the curingagent, the accelerant, the nano silicon dioxide, the lubricant and an organic solvent are intensively mixed, the intensively mixed resin solution and the magnetic powder are intensively mixed under the protection of the inert gas, the solvent is removed by heating and pressure reducing to obtain the magnetic powder-resin mixture containing the nano silicon dioxide, and the Nd-Fe-B bonded magnet can be achieved through pressing and thermosetting processing. The Nd-Fe-B bonded magnet has advantageous mechanical strength, and also has good magnetic property, mold unloading property and dimensionprecision.

Description

technical field [0001] The invention relates to the field of NdFeB magnets, in particular to a bonded NdFeB magnet and a preparation method thereof. Background technique [0002] Bonded NdFeB magnets have excellent magnetic properties, which are mixtures of NdFeB magnetic powder and bonding resin and other components, and then press-molded into the desired magnet shape. Its main components include NdFeB magnetic powder that provides magnetic properties, thermosetting resin as a binder, and functional additives such as curing agent, accelerator, coupling agent, and lubricant. Among them, the strength of the magnet is mainly derived from the resin base as a binder, but the mixture containing only magnetic powder and thermosetting resin generally cannot obtain good formability. Therefore, in Japanese Patent Application H11-045816, for example Metal soaps of calcium stearate and zinc stearate act as lubricants to increase formability, and when lubricants such as the aforementio...

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): H01F1/057H01F1/08H01F41/02C08L63/00C08K5/3445C08K3/38C08K3/36
Inventor 顾鸣岐周永昌
Owner MAGNEQUENCH (TIANJIN) CO LTD
Who we serve
  • R&D Engineer
  • R&D Manager
  • IP Professional
Why Eureka
  • Industry Leading Data Capabilities
  • Powerful AI technology
  • Patent DNA Extraction
Social media
Try Eureka
PatSnap group products

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

© 2024 PatSnap. All rights reserved.Legal|Privacy policy|Modern Slavery Act Transparency Statement|Sitemap