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Ni-based alloy magnetic microwave absorbing material and preparation method thereof

A magnetic wave-absorbing, base alloy technology, applied in the field of Ni-base alloy magnetic wave-absorbing materials and its preparation, can solve the problems of low saturation magnetization, small microwave permeability, poor wave-absorbing ability, etc., and achieve good temperature stability , Strong anti-oxidation ability, good wave-absorbing performance

Active Publication Date: 2017-01-11
GUILIN UNIV OF ELECTRONIC TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Although ferrite is the most widely used and most effective anti-electromagnetic interference material in the hundreds of MHz frequency band, due to its low saturation magnetization, the microwave permeability is small in the 2-18 GHz frequency band, and the wave-absorbing ability is poor. Moreover, the matching thickness is relatively thick (centimeter level), so the application of ferrite materials in this frequency band is greatly limited

Method used

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  • Ni-based alloy magnetic microwave absorbing material and preparation method thereof
  • Ni-based alloy magnetic microwave absorbing material and preparation method thereof
  • Ni-based alloy magnetic microwave absorbing material and preparation method thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0030] Preparation of Pr 16.67 Ni 83.33 The specific implementation steps of the atomic percentage magnetic wave-absorbing material:

[0031] 1) The Pr and Ni metals with a purity ≥ 99.50% are classified as Pr 16.67 Ni 83.33 Stoichiometric ratio ingredients of molecular formula;

[0032] 2) Smelting in a standard 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 3 to 4 times;

[0033] 3) Heat the smelted ingot at 1000°C for 120 hours under vacuum protection, and then quench it in ice water;

[0034] 4) breaking the obtained alloy ingot into a coarse powder with particle size less than 0.5mm, and then sieving under a 300-mesh sieve;

[0035] Product testing: mix according to the ratio of alloy powder: paraffin wax = 4:1 (mass ratio), make coaxial samples with inner diameter and outer diameter of 3mm and 7mm respectively, and thickness of about 3.0-4.0mm, using HP8722ES mic...

Embodiment 2

[0041] Preparation of Pr 16.67 Ni 80 Fe 3.33 The specific implementation steps of the atomic percentage magnetic wave-absorbing material:

[0042] 1) Pr, Fe, Ni metals with a purity ≥ 99.50%, according to Pr 16.67 Ni 80 Fe 3.33 Stoichiometric ratio ingredients of molecular formula;

[0043] 2) Smelting in a standard 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 3 to 4 times;

[0044] 3) heat the smelted ingot at 1050°C for 72 hours under vacuum protection, and then quench it in ice water;

[0045] 4) breaking the obtained alloy ingot into a coarse powder with particle size less than 0.5mm, and then sieving under a 300-mesh sieve;

[0046] Product testing: mix according to the ratio of alloy powder: paraffin = 4:1 (mass ratio), make a coaxial sample with outer diameter and inner diameter of 7mm and 3mm respectively, and a thickness of about 3.0-4.0mm, measure and cal...

Embodiment 3

[0050] Preparation of Pr 16.67 Ni 75 Fe 8.33 The specific implementation steps of the atomic percentage magnetic wave-absorbing material:

[0051] 1) Pr, Fe, Ni metals with a purity ≥ 99.50%, according to Pr 16.67 Ni 75 Fe 8.33 Stoichiometric ratio ingredients of molecular formula;

[0052] 2) Smelting in a standard 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 3 to 4 times;

[0053] 3) heat the smelted ingot at 1050°C for 90 hours under vacuum protection, and then quench it in ice water;

[0054] 4) breaking the obtained alloy ingot into a coarse powder with particle size less than 0.5mm, and then sieving under a 300-mesh sieve;

[0055] Product testing: mix according to the ratio of alloy powder: paraffin = 4:1 (mass ratio), make a coaxial sample with outer diameter and inner diameter of 7mm and 3mm respectively, and a thickness of about 3.0-4.0mm, measure and cal...

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Abstract

The Ni-based alloy magnetic microwave absorbing material and the preparation method thereof of the present invention have the stoichiometric ratio of the molecular formula as follows: Pr 16.67, Ni 83.33-75, Fe 0-8.33. It is prepared by the following main steps: Pr, Fe, Ni metals with purity ≥ 99.50% are used as raw materials, melted under the protection of argon or vacuum, and the ingot is heated at 600-1100°C under the protection of vacuum or argon. Carry out heat treatment, then quench with ice water, then carry out mechanical crushing, milling and ball milling. The Ni-based alloy of the invention has good microwave absorption effect in the 2-18 GHz microwave band, wide absorption frequency range, simple preparation process, strong oxidation resistance and the like. Among the magnetic wave-absorbing materials, the Ni-based alloy magnetic microwave-absorbing material of the present invention is suitable for preparing microwave-absorbing products that require wide absorption frequency band, good wave-absorbing performance and strong oxidation resistance.

Description

technical field [0001] The invention belongs to the field of microwave materials, in particular to a Ni-base alloy magnetic wave-absorbing material and a preparation method thereof. Background technique [0002] As electronic devices and mobile communications are more and more common in daily life, the electromagnetic waves radiated by these electronic devices and devices will not only interfere with the normal work of other electronic devices around them, but also pose a threat to human physical and mental health. . In order to solve the harm caused by electromagnetic radiation, people have carried out a lot of research work. Among them, in the microwave band (especially in the 2-18GHz frequency band), the electromagnetic wave energy is converted into other forms of energy by using magnetic wave-absorbing materials, so as to suppress the radiation and interference of electromagnetic waves, which has a good effect. For example, if the magnetic wave-absorbing material is ap...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C22C19/03B22F1/00
Inventor 姚青荣潘顺康熊吉磊周怀营饶光辉
Owner GUILIN UNIV OF ELECTRONIC TECH
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