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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: 2015-03-25
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
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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 invention discloses a Ni-based alloy magnetic microwave absorbing material and a preparation method thereof. The stoichiometric proportions of a molecular formula of the magnetic microwave absorbing material are as follows: 16.67% of Pr, 83.33%-75% of Ni and 0-8.33% of Fe. The Ni-based alloy magnetic microwave absorbing material is prepared by the following main steps: smelting Pr, Fe and Ni metals, of which the purities are greater than or equal to 99.50% as raw materials under argon or vacuum protection; carrying out heat treatment on a cast ingot at 600-1100 DEG C under vacuum or argon protection; quenching with ice water; and grinding into powder and carrying out ball milling to form powder after mechanically crushing. The Ni-based alloy disclosed by the invention has the advantages of relatively good microwave absorbing effect, wide absorbing frequency band, simple preparation process, high antioxidant resistance and the like in a 2-18GHz of microwave band; and the Ni-based alloy 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 high corrosion resistance in the magnetic wave absorbing material.

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 Applications(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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