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

Method for preparing two-phase manganese-bismuth permanent magnet material

A permanent magnet material, dual-phase manganese-bismuth technology, applied in the direction of magnetic materials, magnetic objects, inductance/transformer/magnet manufacturing, etc., can solve the problem of MnBi/FeCo hysteresis curve collapse, dual-phase composite material remanence and magnetic energy product Improve and affect MnBi/FeCo and other issues, and achieve the effect of simple and easy preparation method, stable permanent magnetic performance and excellent magnetic performance

Inactive Publication Date: 2019-02-12
王顺良
View PDF4 Cites 0 Cited by
  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

MnBi alloys can form multiple closely related phases at room temperature, such as low-temperature phases, high-temperature phases, and new phases, etc., which restricts the development of MnBi alloys to a large extent. great difficulty
[0004] In the prior art, MnBi / FeCo dual-phase composites have been prepared by sonochemical method, but the soft magnetic phase size is in the range of 20-50nm, which leads to serious collapse of MnBi / FeCo hysteresis curve, which affects the MnBi / FeCo dual-phase composite material. Improvement of Remanence and Magnetic Energy Product of Composite Materials
It is difficult to realize the simultaneous control of the nanonization of deposited particles and the continuity of the deposited film with the current packaging methods, and it is more challenging to control the soft magnetic phase particles to about 10nm

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

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0019] The composition chemical formula of the main body of the permanent magnet material in this embodiment is Mn 57 Bi 42 Al 1 .

[0020] Weigh each element according to the chemical formula of the above ingredients for batching; put the batching in the smelting furnace, and vacuumize the furnace to at least 5×10 -3 Pa; Then, pass helium gas until the pressure in the furnace is 50kPa; heat up to 1300°C to melt, stir, refine and cast into water-cooled copper molds for use.

[0021] The obtained alloy ingot is crushed, put into the quartz tube in the vacuum belt throwing machine, the diameter of the nozzle at the bottom of the quartz tube is 0.5 mm, after the chamber of the vacuum belt throwing machine is evacuated, the cavity is filled with protective gas; Turn on the power supply of the vacuum strip machine to heat and melt the alloy in the quartz tube. At the same time, control the distance from the nozzle at the bottom end of the quartz tube to the surface of the copper...

Embodiment 2

[0024] The composition chemical formula of the main body of the permanent magnet material in this embodiment is Mn 52 Bi 45 Al 3 .

[0025] Weigh each element according to the chemical formula of the above ingredients for batching; put the batching in the smelting furnace, and vacuumize the furnace to at least 5×10 -3 Pa; Then, pass helium gas until the pressure in the furnace is 80kPa; heat up to 1450°C to melt, stir, refine, and then cast it into a water-cooled copper mold for use.

[0026] The obtained alloy ingot is crushed and put into the quartz tube in the vacuum strip machine. The diameter of the nozzle at the bottom of the quartz tube is 0.8mm. After the cavity of the vacuum strip machine is vacuumed, fill the cavity with protective gas; Turn on the power supply of the vacuum strip machine to heat and melt the alloy in the quartz tube. At the same time, control the distance from the nozzle at the bottom of the quartz tube to the surface of the copper roller to be 1...

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
Curie pointaaaaaaaaaa
Login to View More

Abstract

The invention discloses a method for preparing a two-phase manganese-bismuth permanent magnet material. The permanent magnet material obtained by the method has an excellent and stable permanent magnetic property and can be obtained by the simple and easy preparation method. By pretreating the surface of hard magnetic particles with acid liquor to remove an oxide layer, the heterogeneous nucleation of a soft magnetic phase on the surface of the hard magnetic particles is facilitated; besides, the soft magnetic phase is continuously and closely arranged on the surface of the hard magnetic particles, and the magnetic property is excellent.

Description

Technical field [0001] The invention relates to the field of magnetic material manufacture, in particular to a method for a dual-phase manganese-bismuth permanent magnet material. Background technique [0002] Rare earth permanent magnet materials refer to permanent magnet materials made of alloys formed of rare earth metals and transition metals through a certain process. Rare earth permanent magnet material is the permanent magnet material with the highest comprehensive performance known now, which is more than 100 times higher than the magnetic properties of the magnetic steel used in the 90th century, much superior to ferrite and AlNiCo, and more than The magnetic properties of expensive platinum-cobalt alloys are twice as high. Due to the use of rare earth permanent magnet materials, it not only promotes the miniaturization of permanent magnet devices and improves the performance of products, but also promotes the production of some special devices. Therefore, the emer...

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): H01F41/02H01F1/047
CPCH01F1/047H01F41/0253
Inventor 王顺良
Owner 王顺良
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