High-temperature-resistant composite wave-absorbing material and preparation method thereof

A composite wave-absorbing material and high-temperature-resistant technology, which is applied in metal material coating technology, electrical components, magnetic field/electric field shielding, etc., can solve problems such as difficult to work, and achieve high magnetic resonance frequency, good high-frequency electromagnetic performance, The effect of strong adhesion

Pending Publication Date: 2020-12-15
ZHEJIANG UNIV OF TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

In these parts, traditional wave-absorbing materials are difficult to work. At present, most wave-absorbing materials cannot meet the needs of high

Method used

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  • High-temperature-resistant composite wave-absorbing material and preparation method thereof
  • High-temperature-resistant composite wave-absorbing material and preparation method thereof
  • High-temperature-resistant composite wave-absorbing material and preparation method thereof

Examples

Experimental program
Comparison scheme
Effect test

Example Embodiment

[0024] Example 1

[0025] (1) First, the metal plate is sandblasted to make the surface rough, and then a transition layer is sprayed on the metal plate by atmospheric plasma spraying, and the thickness of the transition layer is 0.05mm. The flow rate of spraying argon gas is 15L / min, the flow rate of helium gas is 15L / min, the current is 400A, the power is 15kW, and the spraying distance is 80mm.

[0026] (2) The powder of the transition layer is made up of MnZn ferrite, carbonyl iron powder and nano-silicon oxide. 5 parts of carbonyl iron powder, added to PVA aqueous solution to form a slurry, wherein PVA accounts for 1% of the entire wave absorbing agent powder; use a spray dryer to spray granulate the slurry to obtain granulated mixed particles of 60 μm;

[0027] (3) On the transition layer, continue to spray a 1.3mm ferrite absorbing layer on the metal plate by means of atmospheric plasma spraying. The flow rate of spraying argon gas is 35L / min, the flow rate of helium ...

Example Embodiment

[0029] Example 2

[0030] (1) First, the metal plate is sandblasted to make the surface rough, and then a transition layer is sprayed on the metal plate by atmospheric plasma spraying, and the thickness of the transition layer is 0.4mm. The flow rate of spraying argon gas is 55L / min, the flow rate of helium gas is 45L / min, the current is 400A, the power is 25kW, and the spraying distance is 150mm.

[0031] (2) The powder of the transition layer is composed of MnZn ferrite, carbonyl iron powder and nano-silicon oxide. Parts, 10 parts of carbonyl iron powder, add PVA aqueous solution to form slurry, wherein PVA accounts for 1% of the whole microwave absorbing agent powder; use spray dryer to spray granulate the slurry to obtain granulated mixed particles of 150 μm;

[0032] (3) On the transition layer, continue to spray a 1.5mm ferrite absorbing layer on the metal plate by means of atmospheric plasma spraying. The flow rate of spraying argon gas is 55L / min, the flow rate of he...

Example Embodiment

[0035] Example 3

[0036] (1) First, the metal plate is sandblasted to make the surface rough, and then a transition layer is sprayed on the metal plate by atmospheric plasma spraying, and the thickness of the transition layer is 0.25mm. The flow rate of spraying argon gas is 55L / min, the flow rate of helium gas is 45L / min, the current is 400A, the power is 25kW, and the spraying distance is 150mm.

[0037] (2) The powder of the transition layer is composed of MnZn ferrite, carbonyl iron powder and nano silicon oxide. 10 parts, 10 parts of nano-alumina, 20 parts of carbonyl iron powder, add PVA aqueous solution to form a slurry, wherein PVA accounts for 1% of the entire wave absorbing agent powder; use a spray dryer to spray granulate the slurry to obtain a 75 μm granular mixed particles;

[0038](3) On the transition layer, continue to spray a 2.5mm ferrite wave-absorbing layer on the metal plate by means of atmospheric plasma spraying. The flow rate of spraying argon gas ...

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Abstract

The invention discloses a high-temperature-resistant composite wave-absorbing material and a preparation method thereof. The high-temperature-resistant composite wave-absorbing material is a magneticwave-absorbing ceramic coating prepared from high-frequency soft magnetic ferrite and oxide ceramic, and the mass ratio of the high-frequency soft magnetic ferrite to the oxide ceramic is (60:40)-(99:1). According to the coating, the ferrite and oxide mixed particles are deposited on a metal substrate through a plasma spraying method, and the thickness of the coating ranges from 0.5mm to 2.5mm. The prepared high-frequency soft magnetic ferrite/oxide composite wave-absorbing coating is high in adhesive force, high in magnetic conductivity, excellent in stealth performance, good in high-temperature scouring resistance and suitable for being applied to high-temperature parts of stealth equipment.

Description

technical field [0001] The invention relates to a high-temperature-resistant wave-absorbing material, in particular to a high-temperature-resistant composite wave-absorbing material and a preparation method thereof. Background technique [0002] With the continuous progress of society, magnetoelectric materials have been greatly developed. The continuous upgrading of equipment based on this, such as radar for detection purposes and guided missiles for active tracking and strikes, has completely changed the modern battlefield. It can be said that without a suitable stealth material, our aircraft and ships are equivalent to seeing everything in the eyes of the enemy. [0003] In fact, many equipment will generate high temperature during work, and face harsh service environments such as high-speed airflow impact, and these parts are the sources of scattering of radar waves. In these parts, traditional wave-absorbing materials are difficult to work. At present, most wave-absor...

Claims

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Application Information

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IPC IPC(8): C23C4/134C23C4/02C23C4/10C23C4/06H05K9/00
CPCC23C4/134C23C4/02C23C4/10C23C4/06H05K9/0081
Inventor 李旺昌肖世鹏车声雷应耀余靓乔梁郑精武
Owner ZHEJIANG UNIV OF TECH
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