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

Dysprosium oxide coated aluminum-nickel-cobalt permanent magnet material composite powder, preparation method thereof and system device

A technology of permanent magnet materials and composite powders, applied in magnetic materials, magnetic objects, transportation and packaging, etc., can solve the problems of low coercive force, easy demagnetization, easy magnetization of AlNiCo magnets, etc., and achieve the coating layer Uniform, simple method, convenient and controllable coating effect

Pending Publication Date: 2021-03-09
中科院过程工程研究所南京绿色制造产业创新研究院 +1
View PDF7 Cites 0 Cited by
  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0003] However, the disadvantage of AlNiCo permanent magnet materials is that the coercive force is very low (usually less than 160kA / m), so AlNiCo magnets are easily magnetized and demagnetized.

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
  • Dysprosium oxide coated aluminum-nickel-cobalt permanent magnet material composite powder, preparation method thereof and system device
  • Dysprosium oxide coated aluminum-nickel-cobalt permanent magnet material composite powder, preparation method thereof and system device

Examples

Experimental program
Comparison scheme
Effect test

preparation example Construction

[0055] In another specific embodiment, the present invention provides a method for preparing a dysprosium oxide-coated AlNiCo permanent magnet material composite powder, the preparation method comprising:

[0056] (1) Alnico particles with a particle size of 0.5-100 μm are fluidized in a protective atmosphere to obtain fluidized Alnico particles, and the protective gas used in the protective atmosphere includes nitrogen, argon or helium At least one or a combination of two of them;

[0057] (2) Preheat the dysprosium source to 718-1500°C, mix the preheated dysprosium source with the carrier gas, and pass it into the protective atmosphere where the fluidized alnico particles are located at a gas velocity of 50-500mL / min At the same time, the reaction gas is preheated to 0 ~ 100 ° C, the preheated reaction gas is mixed with the carrier gas, and then passed into the protective atmosphere where the Alnico particles in the fluidized state are located at a gas velocity of 75 ~ 500mL...

Embodiment 1

[0060] This embodiment provides a preparation method of dysprosium oxide-coated AlNiCo magnetic material composite powder, the preparation method provided in the present invention such as figure 1 Carried out in the system device shown, described preparation method comprises the following steps:

[0061] (1) Nitrogen is introduced into the fluidized bed reaction device as a protective gas, so that the alnico particles with a particle size of 1 to 3 μm are in a fluidized state in the protective atmosphere;

[0062] (2) the dysprosium source DyCl 3 After preheating to 800°C, the carrier gas is sent to the fluidized bed reaction device 2, and the mixed gas velocity of the dysprosium source and the carrier gas is 50mL / min; the reaction gas is preheated to 30°C and sent to the fluidized bed reaction by the carrier gas Device 2, the mixed gas velocity of the reaction gas and the carrier gas is 75mL / min; the dysprosium source and the reaction gas are simultaneously fed into the flui...

Embodiment 2

[0065] This embodiment provides a preparation method of dysprosium oxide-coated AlNiCo magnetic material composite powder, the preparation method provided in the present invention such as figure 1 Carried out in the system device shown, described preparation method comprises the following steps:

[0066] (1) Pass argon gas into the fluidized bed reaction device as a protective gas, so that the alnico particles with a particle size of 1 to 3 μm are in a fluidized state in the protective atmosphere;

[0067] (2) the dysprosium source DyCl 3 After preheating to 900°C, the carrier gas is sent to the fluidized bed reaction device 2, and the mixed gas velocity of the dysprosium source and the carrier gas is 80mL / min; the reaction gas is preheated to 50°C and sent to the fluidized bed reaction by the carrier gas Device 2, the mixed gas velocity of reaction gas and carrier gas is 120mL / min; Dysprosium source and reaction gas are synchronously fed into fluidized bed reaction device 2,...

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
Granularityaaaaaaaaaa
Particle sizeaaaaaaaaaa
Login to View More

Abstract

The invention provides dysprosium oxide coated aluminum-nickel-cobalt permanent magnet material composite powder, a preparation method thereof and a system device. The preparation method comprises thefollowing steps that aluminum-nickel-cobalt particles in a fluidized state are mixed with a dysprosium source and reaction gas, reacting is carried out, and gas-solid separation is carried out on a reaction product to obtain the dysprosium oxide coated aluminum-nickel-cobalt permanent magnet material composite powder. According to the dysprosium oxide coated aluminum-nickel-cobalt permanent magnet material composite powder, the preparation method thereof and the system device, a fluidization process is adopted, the aluminum-nickel-cobalt powder is in full contact with the dysprosium source and the reaction gas in a fluidized bed reaction device, a dynamic basis is provided for subsequent full reaction, uniform distribution of microcosmic scale of the powder is realized, the uniformity ofmacroscopic scale of a permanent magnet is further ensured, and the coercive force and the temperature stability of an aluminum-nickel-cobalt permanent magnet material are effectively improved.

Description

technical field [0001] The invention belongs to the technical field of magnetic materials, and relates to a composite powder of dysprosium oxide-coated AlNiCo permanent magnet material, a preparation method and a system device thereof. Background technique [0002] AlNiCo is the earliest permanent magnet material developed. Among all the current permanent magnet materials, it has the advantages of stable structure, small temperature coefficient and high Curie temperature, and the working temperature is as high as 520℃. It is especially suitable for equipment with high precision and good stability requirements, and is a permanent magnet material commonly used in military products. With the development of my country's national defense industry in recent years, there are more and more projects to develop advanced weapons and equipment. In these fields, the aluminum-nickel drill permanent magnet alloy used in many permanent magnet components requires a lower temperature coeffici...

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): B22F1/02C23C16/40H01F1/047
CPCC23C16/405H01F1/047B22F1/16
Inventor 崔景毅杨亚锋胡超权邵国强李少夫王宇枭
Owner 中科院过程工程研究所南京绿色制造产业创新研究院
Features
  • Generate Ideas
  • Intellectual Property
  • Life Sciences
  • Materials
  • Tech Scout
Why Patsnap Eureka
  • Unparalleled Data Quality
  • Higher Quality Content
  • 60% Fewer Hallucinations
Social media
Patsnap Eureka Blog
Learn More

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

© 2025 PatSnap. All rights reserved.Legal|Privacy policy|Modern Slavery Act Transparency Statement|Sitemap|About US| Contact US: help@patsnap.com