High-solid-content high-performance injection molding nickel-zinc ferrite granular material and preparation method of sintered magnet

A nickel-zinc ferrite, injection molding technology, applied in inductor/transformer/magnet manufacturing, electrical components, circuits, etc., can solve the problem of low solid content of injection molding pellets, achieve high fluidity, excellent comprehensive performance, Not easy to crack and deform

Active Publication Date: 2020-11-27
江西中石新材料有限公司
View PDF8 Cites 0 Cited by
  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0005] The first purpose of the present invention is to provide a new type of bonding system after treatment with coupling agent and nickel-zinc ferrite The preparation ...

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
  • High-solid-content high-performance injection molding nickel-zinc ferrite granular material and preparation method of sintered magnet
  • High-solid-content high-performance injection molding nickel-zinc ferrite granular material and preparation method of sintered magnet
  • High-solid-content high-performance injection molding nickel-zinc ferrite granular material and preparation method of sintered magnet

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0025] The mass fraction of each component of the injection molding pellets is as follows:

[0026]

[0027] According to the above formula, first mix 47.3g of paraffin wax, 11.8g of microcrystalline wax, 15g of stearic acid, and 9.7g of dibutyl phthalate at 60°C to obtain a soluble composite wax, then add 2.6g of coupling agent KH560, Stir evenly, and after it cools down, it is crushed to obtain soluble binder particles. After mixing 882.3g of nickel-zinc ferrite magnetic powder, 47.9g of polyethylene and 72.3g of coupled soluble binder particles (containing 70.1g of soluble composite wax and 2.2g of coupling agent), extrude through a twin-screw Extrusion pelletizing machine to obtain injection molding pellets. The prepared pellets were injection-molded at 140° C. to obtain an injection-molded green body of a sintered magnet. Then, after two steps of solvent-thermal degreasing, the first step is solvent degreasing in n-heptane reagent at 45°C for 8h, and the second step ...

Embodiment 2

[0029] The mass fraction of each component of the injection molding pellets is as follows:

[0030]

[0031]

[0032] According to the above formula, first mix 47.3g of paraffin wax, 11.8g of microcrystalline wax, 15g of stearic acid, and 9.7g of dibutyl phthalate at 60°C to obtain a soluble composite wax, then add 5.3g of coupling agent KH560, Stir evenly, and after it cools down, it is crushed to obtain soluble binder particles. After mixing 882.3g of nickel-zinc ferrite magnetic powder, 47.9g of polyethylene and 74.5g of coupled soluble binder particles (containing 70.1g of soluble composite wax and 4.4g of coupling agent), they are extruded through a twin-screw Extrusion pelletizing machine to obtain injection molding pellets. The prepared pellets were injection-molded at 140° C. to obtain an injection-molded green body of a sintered magnet. Then, after two steps of solvent-thermal degreasing, the first step is to carry out solvent degreasing in 50°C n-heptane reag...

Embodiment 3

[0034] The mass fraction of each component of the injection molding pellets is as follows:

[0035]

[0036] According to the above formula, first mix 47.3g of paraffin wax, 11.8g of microcrystalline wax, 15g of stearic acid, and 9.7g of dibutyl phthalate at 60°C to obtain a soluble composite wax, then add 7.9g of coupling agent KH550, Stir evenly, and after it cools down, it is crushed to obtain soluble binder particles. After mixing 882.3g of nickel-zinc ferrite magnetic powder, 47.9g of polyethylene and 76.7g of coupled soluble binder particles (containing 70.1g of soluble composite wax and 6.6g of coupling agent), extrude through twin-screw Extrusion pelletizing machine to obtain injection molding pellets. The prepared pellets were injection-molded at 140° C. to obtain an injection-molded green body of a sintered magnet. Then, after two steps of solvent-thermal degreasing, the first step is to carry out solvent degreasing in 50°C n-heptane reagent for 8h, and the seco...

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

No PUM Login to view more

Abstract

The invention discloses a high-solid-content high-performance injection molding nickel-zinc ferrite granular material and a preparation method of a sintered magnet. Firstly, soluble composite wax is prepared, then a coupling agent is uniformly dispersed into the soluble composite wax to obtain soluble binder particles containing the coupling agent, and then the soluble binder particles, polyethylene and nickel-zinc ferrite magnetic powder are mixed, extruded and granulated to obtain the high-solid-content injection molding nickel-zinc ferrite granules. Injection molding, solvent degreasing, thermal degreasing and sintering are carried out on the injection molding granules with the solid content of 58-60vol% to obtain the nickel-zinc ferrite sintered magnet. The obtained granules have highmelt index and fluidity, and the finally obtained green body and sintered body have high strength and magnetic properties.

Description

technical field [0001] The invention relates to the field of injection molding and sintering of magnetic ceramic powder, in particular to the preparation of high-solid-content high-performance injection-molded nickel-zinc ferrite pellets and a sintered magnet. Background technique [0002] In recent years, with the rapid development of the power industry, automobile industry and electronics industry, various electronic components and equipment have become increasingly miniaturized, complicated and diversified, and the demand for small magnetic components with high magnetic properties and complex shapes is also increasing. Increase. As a non-metallic soft magnetic material, nickel-zinc ferrite has the advantages of high resistivity, low temperature coefficient, high Curie temperature, high-frequency performance and low preparation atmosphere requirements, and is easy to synthesize. It is widely used in transformers, high-frequency induction magnetic core, filter and other fi...

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): C04B35/26C04B35/622C04B35/632C04B35/634H01F41/02
CPCC04B35/2658C04B35/2666C04B35/622C04B35/63408C04B35/632C04B35/63496H01F41/0253C04B2235/6022C04B2235/656C04B2235/6567C04B2235/96C04B2235/77C04B2235/61
Inventor 乔梁顾金晖郑精武应耀李涓车声雷余靓李旺昌
Owner 江西中石新材料有限公司
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