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Sm-doped modified quickly-quenched FeSiAl magnetic metal wave-absorbing material and preparation method thereof

A technology of wave absorbing material and magnetic metal, applied in the direction of inorganic material magnetism, inductance/transformer/magnet manufacturing, magnetic field/electric field shielding, etc., can solve the problem of poor wave absorbing dielectric matching characteristics, and achieve the effect of improving impedance matching characteristics

Inactive Publication Date: 2020-01-31
NANJING UNIV OF POSTS & TELECOMM
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0005] The present invention provides a kind of Sm-doped modified fast-quenching FeSiAl magnetic metal wave-absorbing material in order to solve the problem of poor wave-absorbing dielectric matching characteristics of FeSiAl wave-absorbing material

Method used

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  • Sm-doped modified quickly-quenched FeSiAl magnetic metal wave-absorbing material and preparation method thereof
  • Sm-doped modified quickly-quenched FeSiAl magnetic metal wave-absorbing material and preparation method thereof
  • Sm-doped modified quickly-quenched FeSiAl magnetic metal wave-absorbing material and preparation method thereof

Examples

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Embodiment 1

[0044] A Sm-doped modified fast-quenching FeSiAl magnetic metal absorbing material applied to S-band and C-band, comprising the following steps:

[0045] Take high-purity iron (99.99), FeSi alloy (Si 24.99wt% in the alloy), high-purity Al (99.99), rare earth Sm, and the nominal composition of Sm by mole 1 Fe 69 Si 20 al 10 The ingredients, that is, the molar ratio of each element is: Sm: Fe: Si: Al=1:69:20:10, and the total weight is about 40g. Each component is arc smelted in a vacuum smelting furnace. In order to ensure the uniform composition of the smelted alloy, the ingredients need to be smelted three times or more in the vacuum smelting furnace. In the copper crucible in the furnace, the two-stage vacuum system pumps up to 2*10 -3 After Pa, close the vacuum chamber, open the high-purity argon gas pipeline (99.999%) and fill it with high-purity argon gas. After the pressure in the vacuum chamber reaches 0.2Pa, close the vacuum chamber again, and tungsten electrode ar...

Embodiment 2

[0048] A Sm-doped modified fast-quenching FeSiAl magnetic metal absorbing material applied to S-band and C-band, comprising the following steps:

[0049] Take high-purity iron (99.99), FeSi alloy (Si 24.99wt%), high-purity Al (99.99), rare earth Sm, according to the nominal composition Sm 2 Fe 68 Si 20 al 10 Ingredients, that is, the molar ratio of each element is: Sm:Fe:Si:Al=2:68:20:10; the total weight is about 40g. Each component is arc smelted in a vacuum smelting furnace. In order to ensure the uniform composition of the smelted alloy, the ingredients need to be smelted three times or more in the vacuum smelting furnace. The obtained smelting master ingot can properly remove the surface oxide layer, and then put it into the vacuum quenching furnace In the copper crucible, the two-stage vacuum system pumps up to 2*10 -3 After Pa, close the vacuum chamber, open the high-purity argon gas pipeline (99.999%) and fill it with high-purity argon gas. After the pressure in th...

Embodiment 3

[0052] A Sm-doped modified fast-quenching FeSiAl magnetic metal absorbing material applied to S-band and C-band, comprising the following steps:

[0053] Take high-purity iron (99.99), FeSi alloy (Si 24.99wt%), high-purity Al (99.99), rare earth Sm, according to the nominal composition Sm 1 Fe 79 Si 10 al 10 Ingredients, that is, the molar ratio of each element is: Sm:Fe:Si:Al=1:79:10:10; the total weight is about 40-50g. Each component is arc smelted in a vacuum smelting furnace. In order to ensure the uniform composition of the smelted alloy, the ingredients need to be smelted three times or more in the vacuum smelting furnace. In the copper crucible in the furnace, the two-stage vacuum system pumps up to 2*10 -3 After Pa, close the vacuum chamber, open the high-purity argon gas pipeline (99.999%) and fill it with high-purity argon gas. After the pressure in the vacuum chamber reaches 0.2Pa, close the vacuum chamber again, and tungsten electrode arc-melts the mother ingo...

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Abstract

The invention relates to a preparation method of an Sm-doped modified quickly-quenched FeSiAl magnetic metal wave-absorbing material. The preparation method comprises the steps of smelting, quick quenching, and crushing and fine grinding. According to the smelting step, raw materials of rare earth Sm and FeSiAl are added into a vacuum smelting furnace so as to be smelt, so that an alloy master ingot can be obtained. According to the quick quenching step, the alloy master ingot is rapidly quenched in a vacuum rapid quenching furnace, so that an alloy quickly-quenched thin strip is obtained. According to the crushing and fine grinding step, the quickly-quenched thin strip is crushed on a high-speed crusher, and refined and crushed metal powder is subjected to high-energy ball milling on a high-energy ball mill, so that ball-milled powder can be obtained; and the powder which has been subjected to high-energy ball milling is subjected to vacuum drying, so to that the Sm-doped modified FeSiAl magnetic alloy wave-absorbing material can be obtained. The Sm-modified quickly-quenched FeAlSi magnetic metal wave-absorbing material prepared by the preparation method can be used for absorbingelectromagnetic waves in an S waveband and a C waveband of radar waves.

Description

technical field [0001] The invention relates to a metal wave-absorbing material, in particular to a Sm-doped modified fast-quenching FeSiAl magnetic metal wave-absorbing material and a preparation method. Background technique [0002] Absorbing materials refer to materials that can absorb, attenuate and lose electromagnetic wave energy incident from space, thereby reducing or eliminating the reflected electromagnetic wave. In modern military warfare, due to the stealth requirements of radar waves such as aircraft, missiles, and ships, Absorbing materials have been widely used, not only that, in civilian use, due to the mandatory requirements of electromagnetic compatibility, absorbing materials are widely used in mobile phones, computers, digital cameras, electric vehicles and other equipment or products, in my country, due to For historical reasons, most of the absorbing materials are magnetic absorbing materials, which have both magnetic and dielectric properties. [0003] ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H05K9/00H01F1/01H01F41/00C22C38/02C22C38/06C22C33/06B22F9/04B22D11/06
CPCB22D11/0611B22F9/04B22F2009/043C22C33/06C22C38/005C22C38/02C22C38/06C22C2202/02H01F1/01H01F41/00H05K9/0081
Inventor 谢宁彦谢国治郑佳琳高鑫刘小曼谌静
Owner NANJING UNIV OF POSTS & TELECOMM
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