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

Ferrite particle powder for bonded magnet, resin composition for bonded magnet, and molded article using ferrite particle powder and resin composition

A technology of resin composition and bonded magnet, which is applied in the fields of ferrite particle powder for bonded magnets and resin composition for bonded magnets, can solve the problems of high price and limitation, and achieve excellent tensile elongation, magnetic Excellent effect

Active Publication Date: 2016-06-01
TODA IND
View PDF11 Cites 5 Cited by
  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Rare earth magnet powder has high magnetic properties, however, the price is also high, which limits the usable applications

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
  • Ferrite particle powder for bonded magnet, resin composition for bonded magnet, and molded article using ferrite particle powder and resin composition
  • Ferrite particle powder for bonded magnet, resin composition for bonded magnet, and molded article using ferrite particle powder and resin composition
  • Ferrite particle powder for bonded magnet, resin composition for bonded magnet, and molded article using ferrite particle powder and resin composition

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0087]

[0088] Weigh powdered α-Fe so that the molar ratio becomes 2Fe:Sr=5.90:1 2 o 3 and SrCO 3 , after mixing for 30 minutes using a wet mill, filter and dry. SrCl was added to the obtained raw material mixed powder 2 and Na 2 B 4 o 7 The aqueous solution is mixed thoroughly and then granulated. At this time, SrCl 2 and Na 2 B 4 o 7 The addition amount of the powder was set to 2.0% by weight and 0.2% by weight with respect to the above-mentioned raw material mixed powder. The obtained granulated material was baked at 1120 degreeC for 2 hours in air|atmosphere. The obtained fired product was roughly pulverized, then pulverized by a wet mill for 30 minutes, washed with water, filtered, and dried. Then, a mixed solution of isopropanol and triethanolamine was added, and further pulverized by a vibration mill for 30 minutes. At this time, mixed solutions of isopropanol and triethanolamine were added in amounts of 0.2% by weight and 0.1% by weight to the above-men...

Embodiment 2

[0090] Ferrite particle powder was produced in the same manner as in Example 1 above except that the composition, the type and amount of additives, the firing temperature, and the like were changed in various ways.

[0091] The production conditions at this time are shown in Table 1, and the characteristics of the obtained ferrite particle powder for bonded magnets are shown in Table 2.

Embodiment 3

[0097]

[0098] Add 25000g of the ferrite particle powder obtained in Example 1 to the Henschel mixer, add 0.6wt% aminoalkyl silane coupling agent relative to the ferrite particle powder, mix for 20 minutes until uniform, and then add 3067 g of 12-nylon resin with a relative viscosity of 1.60 was mixed for another 30 minutes to prepare a mixture of resin compositions for bonded magnets.

[0099] The obtained bonded magnet composition mixture was quantitatively supplied to a twin-screw kneader, kneaded at a temperature at which 12-nylon melts, and the kneaded product was formed into strands, taken out, and cut into The resin composition for bonded magnets was obtained in the form of pellets of different sizes.

[0100] Table 3 shows the production method and characteristics of the resin composition for bonded magnets.

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
densityaaaaaaaaaa
particle sizeaaaaaaaaaa
specific surface areaaaaaaaaaaa
Login to View More

Abstract

The present invention provides: a ferrite particle powder for a bonded magnet and a resin composition for a bonded magnet which make it possible to obtain a bonded magnet molded article having good tensile elongation and excellent magnetic characteristics; and a bonded magnet molded article, such as a rotor, using the composition. The present invention pertains to: a ferrite particle powder for a bonded magnet, said ferrite particle powder having a bulk density of at least 0.5g / cm3 but less than 0.6g / cm3, and a degree of compression of at least 65%; a resin composition for a bonded magnet, said resin composition using the ferrite particle powder for a bonded magnet; and a molded article.

Description

technical field [0001] The present invention relates to ferrite particle powder for bonded magnets and a resin composition for bonded magnets capable of obtaining a bonded magnet molded body having a good tensile elongation, and to a ferrite particle powder or the composition using the above-mentioned ferrite particles Bonded magnet moldings such as rotors. Background technique [0002] Compared with sintered magnets, bonded magnets are known to be lighter in weight, have higher dimensional accuracy, and can easily mass-produce complicated shapes. Therefore, they are widely used in toys, office equipment, audio equipment, and engines. and other uses. [0003] As the magnetic powder used in the bonded magnet, rare earth magnet powder or ferrite particle powder represented by Nd—Fe—B system is known. Rare earth magnet powders have high magnetic properties, however, they are also expensive, which limits their usable applications. On the other hand, ferrite particle powder is...

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 Applications(China)
IPC IPC(8): H01F1/11C01G49/00H01F1/113H02K15/03
CPCH01F1/113C01G49/0036C01P2004/20C01P2004/61C01P2004/62C01P2006/11C01P2006/12C01P2006/42C01P2004/22C04B35/26C04B35/6261C04B35/62645C04B35/634C04B2235/3201C04B2235/3213C04B2235/3409C04B2235/5436C04B2235/5445C04B2235/6022C04B2235/77C01G49/0063C01G49/009C01P2006/10C04B35/632C08K3/22C08K2003/2206C08K2003/2265H01F1/0306
Inventor 西尾靖士樱井洋光福品德浩藤井泰彦
Owner TODA IND
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