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Dual-phase nanocrystalline high-frequency soft magnetic material and preparation method thereof

A technology of soft magnetic materials and nanocrystals, applied in the direction of magnetic materials, magnetic objects, electrical components, etc., can solve the problems of low resonance frequency, low saturation magnetization, and unsatisfactory, and achieve the effect of high resonance frequency

Active Publication Date: 2017-01-11
CENT IRON & STEEL RES INST
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  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

Compared with the traditional ferrite material, the high saturation magnetization makes the metal material have a higher product of initial permeability and resonance frequency, but the lower magnetic crystal anisotropy field leads to a lower resonance frequency, which still cannot satisfy The current demand for high-frequency applications of microwave absorbers
Nanomagnetic metal particles published in Appl.Phys.Lett.89, 0531154 (2006) have higher surface anisotropy than bulk materials, which makes the resonant frequency of nanoparticles reach GHz band, but the reduction of saturation magnetization makes The initial permeability value of the sample is very low, which cannot meet the application of the sample in real life
[0004] The easy-faced rare earth intermetallic compounds have high resonance frequency, but the initial value of permeability is low because the saturation magnetization is significantly lower than that of 3d metal alloys

Method used

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  • Dual-phase nanocrystalline high-frequency soft magnetic material and preparation method thereof
  • Dual-phase nanocrystalline high-frequency soft magnetic material and preparation method thereof
  • Dual-phase nanocrystalline high-frequency soft magnetic material and preparation method thereof

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preparation example Construction

[0034] The preparation method of the dual-phase nanocrystalline high-frequency soft magnetic material of the present invention comprises the following steps:

[0035] a) Weigh the rare earth element R and pure Fe, Co, M according to the alloy ratio, melt the rare earth element R, pure Fe, Co, M under the protection of an inert gas to form a dual-phase master alloy, wherein the rare earth intermetallic compound R (Fe x co 1-x ) a m 12-a It accounts for 5%-95% by volume, and the rest is 3d metal alloy A;

[0036] b) A quenched alloy in an amorphous state, a nanocrystalline state or a mixed state of amorphous and nanocrystalline state is obtained by a melt rapid quenching method, and the linear speed of the melt rapid quenching is 10-80 m / s;

[0037] c) Pulverize the prepared quick-quenching alloy under the protection of antioxidants and coupling agents into alloy powders with a particle size of less than 5 microns, wherein the antioxidant is 5‰-10‰ of the alloy quality, and ...

Embodiment 1

[0041] The dual-phase nanocrystalline high-frequency soft magnetic material of embodiment 1 is made of nanometer-sized ThMn 12 Rare earth intermetallic compound Nd(Fe 0.7 co 0.3 ) 10 V 2 and 3d metal alloy Fe 0.7 co 0.3 Composite composition, configure R(Fe x co 1-x ) a m 12-a : A is 50:50 (volume ratio).

[0042] The preparation method of the dual-phase nanocrystalline high-frequency soft magnetic material of embodiment 1 comprises the following steps:

[0043] a) Weigh 8.6980g Nd, 24.6957g Fe, 11.1692g Co and 5.8512g V, Nd(Fe 0.7 co 0.3 ) 10 V 2 with Fe 0.7 co 0.3 The volume ratio is 50:50, and it is smelted into a master alloy under the protection of argon;

[0044] b) A quenched alloy in an amorphous state, a nanocrystalline state or a mixed state of amorphous and nanocrystalline state is obtained by the melt rapid quenching method, and the rapid quenching line speed is 20 m / s;

[0045] c) Grind the prepared quick-quenching alloy into particles with a part...

Embodiment 2

[0053] The dual-phase nanocrystalline high-frequency soft magnetic material of embodiment 2 is made of nanometer-sized ThMn 12 Rare earth intermetallic compound Nd(Fe 0.5 co 0.5 ) 10 V 2 and 3d metal alloy Fe 0.5 co 0.5 Composite composition, configure R(Fe x co 1-x ) a m 12-a : A is 5:95 (volume ratio).

[0054] The preparation method of the dual-phase nanocrystalline high-frequency soft magnetic material of embodiment 2 comprises the following steps:

[0055] a) Weigh 3.7751g Nd, 21.1932g Fe, 22.3652g Co and 2.6665g V, Nd(Fe 0.5 co 0.5 ) 10 V 2 with Fe 0.5 co 0.5 The volume ratio is 5:95, and it is smelted into a master alloy under the protection of argon;

[0056] b) A quenched alloy in an amorphous state, a nanocrystalline state, or a mixed state of an amorphous state and a nanocrystalline state is obtained by a melt rapid quenching method, and the rapid quenching line speed is 80 m / s;

[0057] c) Grind the prepared quick-quenching alloy into particles of ...

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Abstract

The invention belongs to the field of a soft magnetic material, and particularly relates to a planar rare-earth IMC (Intermetallic Compound)-3d (Three-dimensional) metal alloy diphasic nanocrystalline high-frequency soft magnetic material with planar anisotropy and a preparation method thereof. The soft magnetic material is composed of a ThMn12 rare-earth IMC compound R (FexCo1-x)Am12-a of a nano size and a 3d metal alloy A, and ingredients by volume are below: R (FexCo1-x)Am12-a is 5-95% and the rest is 3d transition alloy A. Relevant experimental investigation shows that the planar rare-earth IMC-3d metal alloy diphasic nanocrystalline high-frequency soft magnetic material has high-frequency electromagnetism superior to the prior art; in the absence of orientation, the initial value of permeability reaches up to 3.0 or more, the resonant frequency reaches up to 9GHz or above, the initial value of permeability reaches up to 3.5 after the rotary orientation of a magnetic field, and the resonant frequency is unchanged; under the precondition of ensuring high initial value of the complex permeability, the high-frequency soft magnetic material is higher in resonant frequency.

Description

technical field [0001] The invention belongs to the field of soft magnetic materials, in particular to an easy-faced ThMn with easy-face anisotropy 12 Type rare earth intermetallic compound-3d metal alloy dual-phase nanocrystalline high-frequency soft magnetic material and its preparation method. Background technique [0002] In recent years, with the increasing application frequency of electronic devices, their working frequency has reached GHz band, such as 4G mobile phone communication, its application frequency has reached 3.6 GHz; the application frequency of electronic toll collection system in intelligent transportation has been determined to be 5.8 GHz; the application frequency of the Wi-Fi wireless local area network system is 5.1GHz. The wide application of electronic devices has drawn more and more attention to electromagnetic pollution as a new special environmental pollution. Therefore, the research and development of electromagnetic wave absorbing materials w...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): H01F1/147B22F3/03
Inventor 韩瑞李卫朱明刚周栋李发伸
Owner CENT IRON & STEEL RES INST
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