Samarium-iron-nitrogen and iron-platinum double phase nano magnetic material and its preparing method

A nano-magnetic material, samarium-iron-nitrogen technology, applied in the direction of magnetism of inorganic materials, can solve the problems of no magnetic performance, no exchange coupling effect, etc., and achieve the effect of easy operation, simple equipment and high magnetic performance

Inactive Publication Date: 2008-12-10
HEBEI UNIV OF TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

The magnets of the above-mentioned existing inorganic materials are all single-phase magnetic materials. The disadvantages of this type of magnetic materials are: there is no exchange coupling effect between the hard magnetic phase and the soft magnetic phase interface, and there is no potential to exert its magnetic properties.
At present, the orientation anisotropy model of this magnet has not been reported publicly.

Method used

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  • Samarium-iron-nitrogen and iron-platinum double phase nano magnetic material and its preparing method
  • Samarium-iron-nitrogen and iron-platinum double phase nano magnetic material and its preparing method
  • Samarium-iron-nitrogen and iron-platinum double phase nano magnetic material and its preparing method

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0033] (1) Melting of master alloy

[0034] Use iron, samarium, and platinum with a purity greater than 99.9% as raw materials, and the mass ratio is Sm:Fe:Pt=10:86:4. The raw materials that are batched according to the ratio are placed in a non-consumable vacuum electric arc furnace, also known as a button furnace. The master alloy was melted under the protection of pure argon, smelted twice, each time for 3 minutes, and the current was 50A, and the iron samarium platinum master alloy Sm was obtained. 10 Fe 85 Pt 1 .

[0035] (2) Alloy throwing belt

[0036] Put the iron samarium-platinum master alloy prepared in step (1) into a quartz tube, place the quartz tube in the high-frequency induction coil in the cavity of the vacuum single-roller melt stripping machine, the bottom of the quartz tube is away from the copper roller The distance between them is 2mm, and argon gas is introduced to control the pressure difference Δp between the gas storage pressure tank and the cavi...

Embodiment 2

[0042] Except that step (3) was carried out at 800° C. for crystallization, the others were the same as in Example 1. Thus, Sm with grain size d≤30nm is obtained 2 Fe 17 N 3 -Fe 3 Pt dual-phase nano-magnetic material, the magnetic performance test results are shown in Table 1.

Embodiment 3

[0044] (1) Melting of master alloy

[0045] Use iron, samarium, and platinum with a purity greater than 99.9% as raw materials, and the mass ratio is Sm:Fe:Pt=9:85:6. The raw materials that are batched according to the ratio are placed in a non-consumable vacuum electric arc furnace, also known as a button furnace. Melt the master alloy under the protection of pure argon, smelt 3 times, each time for 2 minutes, and the current is 180A, and obtain the iron samarium platinum master alloy Sm 9 Fe 85 Pt 6 ;

[0046] (2) Alloy throwing belt

[0047] Put the iron samarium-platinum master alloy prepared in step (1) into a quartz tube, place the quartz tube in the high-frequency induction coil in the cavity of the vacuum single-roller melt stripping machine, the bottom of the quartz tube is away from the copper roller The distance between them is 3.5mm, and argon is introduced to control the pressure difference Δp between the gas storage pressure tank and the cavity of the strip m...

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Abstract

The present invention relates to inorganic magnetic material, and is especially double phase nanometer composite material of samarium-iron-nitrogen and iron-platinum. The double phase nanometer composite material has the composition of Sm2Fe17N3-Fe3Pt, crystal grain size not greater than 30 nm, base phase of hard magnetic RE-Fe nitride and soft of nanometer BCC Fe3Pt and dispersed in the base phase, and oriented easy axis. The double phase nanometer composite material is prepared through an in-situ autogenesis process including the steps of smelting mother alloy, forming alloy belt, and crystallizing. The magnetic material of the present invention possesses exchange coupling effect in the phase interface between the hard magnetic phase and the soft magnetic phase and high magnetic performance.

Description

technical field [0001] The technical scheme of the invention relates to a magnet of inorganic materials, specifically a samarium-iron-nitrogen-iron-platinum dual-phase nano-magnetic material and a preparation method thereof. Background technique [0002] CN 94112455.X discloses the technology of using boron nitride or silicon nitride as raw material to directly smelt rare earth transition metal nitrides together with rare earth and transition metal raw materials; 0.3μ-10μ size of iron, samarium, solid nitrogen amorphous powder, and put the powder into the protective gas nitrogen for vacuum heat treatment to make a technology of samarium iron nitrogen permanent magnet; CN 95118887.9 discloses a High-performance RE-Fe-B nanocrystalline alloy containing RE, the chemical formula of the alloy is RExFeyCozBuMvCuw, where M is one or more elements selected from Nb, Mo, V, W and Ta; CN 98102207.3 discloses a The preparation method of the rare earth-iron nitride permanent magnet mate...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): B22F1/00B22F9/04H01F1/06C22C29/16C22C33/08B22D11/06C22F1/02
Inventor 崔春翔孙继兵弓俊杰杨薇郭平
Owner HEBEI UNIV OF TECH
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