Unlock instant, AI-driven research and patent intelligence for your innovation.

Preparation method of samarium-cobalt-nitrogen permanent magnet material

A permanent magnet material, samarium cobalt technology, applied in the direction of magnetic materials, magnetic objects, electrical components, etc., can solve the problems of low coercivity, low magnetic product energy, etc., and achieve the effect of good magnetic performance

Inactive Publication Date: 2016-07-20
温州弘恒电子科技有限公司
View PDF4 Cites 1 Cited by
  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

At present, although the temperature stability of samarium-cobalt permanent magnet materials is relatively high, the coercive force of samarium-cobalt permanent magnet materials in the prior art such as 2:17 type samarium-cobalt alloy is not high, and the coercive force of 1:5 type samarium-cobalt alloy is not high. The magnetic product energy of the alloy is low, so the samarium cobalt permanent magnet material with high comprehensive magnetic properties such as coercive force and magnetic product energy has yet to be researched and developed.

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

[0014] The raw material of the samarium cobalt nitrogen permanent magnet material master alloy prepared by this embodiment is expressed as: (Sm 0.84 Nb 0.15 PR 0.01 ) 2 (Co 0.82 Ti 0.12 al 0.05 B 0.01 ) 17 .

[0015] Mix Sm, Nb, Pr, Co, Ti, Al and B according to the above atomic ratio, put them into the copper crucible (water-cooled) of the electric arc furnace at the same time, close the electric arc furnace cavity and evacuate to 10 -4 mbar, continuous gas washing 2 times, and the pressure of high-purity Ar gas is 500mbar for each gas washing. After the gas washing is completed, the cavity is filled with high-purity Ar gas 600mbar. Melt evenly, turn off the current and wait for the alloy liquid to cool, turn the alloy ingot up and down with a manipulator, repeat the above steps, repeat the melting 5 times in total, and obtain the master alloy ingot after cooling.

[0016] The annealing treatment of the master alloy ingot is as follows: put the master alloy ingot int...

Embodiment 2

[0020] The raw material of the samarium cobalt nitrogen permanent magnet material master alloy prepared by this embodiment is expressed as: (Sm 0.78 Nb 0.20 PR 0.02 ) 2 (Co 0.70 Ti 0.15 al 0.12 B 0.03 ) 17 .

[0021] Mix Sm, Nb, Pr, Co, Ti, Al and B according to the above atomic ratio, put them into the copper crucible (water-cooled) of the electric arc furnace at the same time, close the electric arc furnace cavity and evacuate to 10 -5 mbar, wash gas continuously for 3 times, and fill high-purity Ar gas with a pressure of 600mbar each time. Melt evenly, turn off the current and wait for the alloy liquid to cool, turn the alloy ingot up and down with a manipulator, repeat the above steps, repeat the melting 6 times in total, and obtain the master alloy ingot after cooling.

[0022] The annealing treatment of the master alloy ingot is as follows: put the master alloy ingot into a quartz tube sealed at one end, and wash the gas through the vacuum sealing tube system. A...

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
Average particle sizeaaaaaaaaaa
Login to View More

Abstract

The invention discloses a preparation method of a samarium-cobalt-nitrogen permanent magnet material. A raw material of a mother alloy of the samarium-cobalt-nitrogen permanent magnet material is shown as the specification: (Sm<1-x-y>NbxPry)2(Co<1-a-b-c>TiaAlbBc)17, wherein x is equal to 0.15-0.20, y is equal to 0.01-0.02, a is equal to 0.12-0.15, b is equal to 0.05-0.12 and c is equal to 0.01-0.03. According to the samarium-cobalt-nitrogen permanent magnet material prepared by the invention, one part of Sm is replaced with Nb and one part of Co is replaced with Ti, so that a comprehensive magnetic property of the material is improved; heavy rare earth Pr and Al which has a synergistic effect with B so as to improve the corrosion-resisting property of a magnet are compounded and added; in a preparation process, a powder liquid-phase sintering method is adopted and the prepared mother alloy contains a weak-magnetic grain boundary phase capable of containing surplus Sm atoms; and prepared magnetic powder has good magnetic properties, oxidization resistance and corrosion resistance.

Description

technical field [0001] The invention relates to a preparation method of a permanent magnet material, in particular to a preparation method of a samarium cobalt nitrogen permanent magnet material. Background technique [0002] Rare earth permanent magnets have the characteristics of high remanence, high coercive force and high magnetic energy product, and are widely used in power electronics, communications, information, motors, transportation, office automation, medical equipment, military and other fields. After more than 20 years of research and development, the magnetic energy product of rare earth permanent magnets has been greatly improved, but the coercive force of rare earth permanent magnets still has a lot of room for improvement. [0003] Nd-Fe-B based magnets can be prepared as magnets with high coercive force, an important source of coercive force is the main phase Nd with a smooth boundary surrounded by a neodymium-rich phase 2 Fe 14 The microstructure of B gr...

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): H01F1/059C22C30/00
CPCC22C30/00H01F1/059
Inventor 不公告发明人
Owner 温州弘恒电子科技有限公司