LaCeNi magnetic wave absorbing material and preparation method thereof

A technology of magnetic wave absorption and stoichiometric ratio, applied in the direction of magnetic materials, magnetic objects, electrical components, etc., can solve the problems of restricting the application of materials, lack of saturation magnetization and magnetic permeability, and failure to achieve light weight and strong absorption , to achieve the effect of good microwave absorption characteristics, good microwave absorption performance, and wide absorption frequency band

Active Publication Date: 2015-03-25
GUILIN UNIV OF ELECTRONIC TECH +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0003] Ferrite type and metal micropowder are the two most widely used materials in traditional microwave absorbing materials. However, ferrite materials, which are deeply affected by their own defects in application, not only do not have sufficient saturation magnetization in the commonly used frequency range. The strength and magnetic permeability are not enough to meet the requirements of light weight and strong absorption. These deficiencies seriously restrict the application of this material.

Method used

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  • LaCeNi magnetic wave absorbing material and preparation method thereof
  • LaCeNi magnetic wave absorbing material and preparation method thereof
  • LaCeNi magnetic wave absorbing material and preparation method thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0024] Preparation of La 16.7 Ni 83.3 The specific implementation steps of the atomic percentage magnetic wave-absorbing material are:

[0025] 1) La and Ni metals with a purity ≥ 99.90%, according to La 16.7 Ni 83.3 The stoichiometric ratio of the atomic percentage of the ingredients;

[0026] 2) Melting in a non-consumable vacuum electric arc furnace under the protection of argon, in order to ensure that the composition of the alloy is uniform, repeatedly turning and melting for 2 to 5 times;

[0027] 3) Keep the smelted ingot under vacuum protection at a temperature of 1000°C for 2 days and then quench it in ice water;

[0028] 4) Mechanically crush the obtained alloy ingot to obtain alloy coarse powder, then put zirconia balls and coarse powder into a zirconia tank at a mass ratio of 20:1, add absolute ethanol as a protective agent, and use QM-lSP planetary The type ball mill ball mills the alloy coarse powder for 20 hours, and the ball mill rotating speed is 350 rev / ...

Embodiment 2

[0035] Preparation of La 13.3 Ce 3.4 Ni 83.3 The specific implementation steps of the atomic percentage magnetic wave-absorbing material are:

[0036] 1) La, Ce, Ni metals with a purity ≥ 99.90%, according to La 13.3 Ce 3.4 Ni 83.3 Stoichiometric ratio ingredients of molecular formula;

[0037] 2) Melting in a non-consumable vacuum electric arc furnace under the protection of argon, in order to ensure the uniformity of the composition of the alloy, repeatedly turning and melting for 3 to 5 times;

[0038] 3) Keep the smelted ingot under vacuum protection at 800°C for 4 days and then quench it in ice water;

[0039] 4) Mechanically crush the obtained alloy ingot to obtain alloy coarse powder, then put the zirconia ball and the coarse powder into the zirconia tank at a mass ratio of 20:1, add gasoline as a protective agent, and use a QM-lSP planetary ball mill to The alloy coarse powder was ball milled for 20 hours, and the speed of the ball mill was 350 rpm;

[0040]Pro...

Embodiment 3

[0044] Preparation of La 10.0 Ce 6.7 Ni 83.3 The specific implementation steps of the atomic percentage magnetic wave-absorbing material are:

[0045] 1) La, Ce, Ni metals with a purity ≥ 99.90%, according to La 10.0 Ce 6.7 Ni 83.3 Stoichiometric ratio ingredients of molecular formula;

[0046] 2) Melting in a non-consumable vacuum electric arc furnace under the protection of argon, in order to ensure the uniformity of the composition of the alloy, repeatedly turning and melting for 3 to 5 times;

[0047] 3) Keep the smelted ingot under vacuum protection at a temperature of 1000°C for 3 days and then quench it in ice water;

[0048] 4) Mechanically crush the obtained alloy ingot to obtain alloy coarse powder, then put the zirconia ball and the coarse powder into the zirconia tank at a mass ratio of 20:1, add gasoline as a protective agent, and use a QM-lSP planetary ball mill to The alloy coarse powder was ball milled for 20 hours, and the speed of the ball mill was 350...

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Abstract

The invention discloses a LaCeNi magnetic microwave absorbing material and a preparation method thereof. The stoichiometric proportions of a molecular formula of the magnetic wave absorbing material are as follows: 10.0%-16.7% of La, 0-6.0% Ce and 83.3% Ni. The LaCeNi magnetic microwave absorbing material is prepared by the following main steps: smelting La, Ce and Ni metals, of which the purities are greater than or equal to 99.90% as raw materials under argon protection; carrying out heat treatment on a cast ingot in vacuum at 800-1050 DEG C; quenching with ice water; and carrying out ball-milling to form powder after mechanically crushing. The LaCeNi magnetic microwave absorbing material has relatively excellent microwave absorbing property in a 2-18GHz of microwave band; when the thickness of a compound is 1.5mm, the minimal absorption peak can reach about 40.1dB; the LaCeNi alloy disclosed by the invention has the advantages of good wave absorbing property, wide absorbing frequency band, simple preparation process, good corrosion resistance and the like in the 2-18GHz of microwave band; and the LaCeNi magnetic microwave absorbing material disclosed by the invention is suitable for preparation of microwave absorbing products of requiring wide absorbing frequency band, good wave absorbing property and good corrosion resistance in the magnetic wave absorbing material.

Description

technical field [0001] The invention belongs to magnetic microwave absorbing materials, in particular to LaCeNi magnetic microwave absorbing materials and a preparation method thereof. Background technique [0002] As electromagnetic waves in the GHz frequency range are widely used in various fields such as local area networks, mobile phones, and radar systems, electromagnetic radiation has caused serious electromagnetic pollution to the human living environment and brought great harm to people's lives. In order to solve the problems caused by electromagnetic wave radiation, people have carried out a lot of research work. Among them, magnetic wave-absorbing materials are used to convert electromagnetic wave energy into other forms of energy, so as to suppress electromagnetic wave radiation and interference, which has a good effect. . For example, applying magnetic absorbing materials on the surface of electronic products such as TVs, computers, and mobile communications can...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C22C19/03C22C1/02C22F1/10B22F1/00B22F9/04H01F1/147
Inventor 成丽春熊吉磊潘顺康周怀营饶光辉
Owner GUILIN UNIV OF ELECTRONIC TECH
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