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Composite high-temperature-resistant wave-absorbing coating material and preparation method of wave-absorbing coating

A wave-absorbing coating and high-temperature-resistant technology, which is applied in the field of high-temperature-resistant dielectric electromagnetic wave-absorbing coating and its preparation, can solve the problems of poor matching performance of high-temperature resistance of ceramic aggregates, and achieve low cost and good heat resistance Excellent performance and operability

Active Publication Date: 2011-09-07
成都佳驰电子科技股份有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0003] Most of the current wave-absorbing coatings use organic adhesives with limited heat resistance as the binder, so the prepared wave-absorbing coatings can only be used below 300°C, which leads to matching the high temperature resistance of the ceramic aggregates. The performance is very poor; in actual industrial production, there will be a harsh working environment at 500-700 °C, and an inorganic adhesive with good high temperature resistance and high bonding strength is selected as the adhesive to prepare a high temperature resistant wave-absorbing coating, which overcomes the It overcomes the lack of high temperature resistance of organic adhesives, and at the same time has various advantages of adhesive coatings (such as simple molding process, coating of various complex structures, economy, environmental protection, etc.), thus greatly broadening its application field in industry , but there are few reports at home and abroad on the technology of using inorganic binders to prepare wave-absorbing coatings

Method used

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  • Composite high-temperature-resistant wave-absorbing coating material and preparation method of wave-absorbing coating
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  • Composite high-temperature-resistant wave-absorbing coating material and preparation method of wave-absorbing coating

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specific Embodiment approach 1

[0026] A high temperature resistant electromagnetic wave absorbing coating, which is composed of aluminum dihydrogen phosphate, magnesium oxide, aluminum oxide and crystalline silicon, and the components are mutually fused according to the following mass percentages:

[0027] Aluminum dihydrogen phosphate 18

[0028] Magnesium Oxide 1

[0029] Aluminum oxide 1

[0030] Crystalline silicon 80

[0031] Spray on an aluminum plate with a size of (20*20 cm) by spraying method and form a high temperature resistant wave-absorbing coating with a thickness of 1.3 mm.

[0032] The high temperature resistant electromagnetic wave absorbing coating can be obtained through the above preparation steps. At this time, the performance of the coating is stable at 800° C., and its reflectivity is lower than -5 dB at 4 GHz to 8 GHz, and the peak value reaches -32 dB.

specific Embodiment approach 2

[0033] A high temperature resistant electromagnetic wave absorbing coating, which is composed of aluminum dihydrogen phosphate, magnesium oxide, aluminum oxide and crystalline silicon, and the components are mutually fused according to the following mass percentages:

[0034] Aluminum dihydrogen phosphate 14.4

[0035] Magnesium oxide 0.8

[0036] Aluminum oxide 0.8

[0037] Crystalline silicon 84

[0038] Spray on an aluminum plate with a size of (20*20 cm) by spraying method and form a high temperature resistant wave-absorbing coating with a thickness of 1.3 mm.

[0039] The high temperature resistant electromagnetic wave absorbing coating can be obtained through the above preparation steps. At this time, the performance of the coating is stable at 800° C., and its reflectivity is lower than -5 dB at 8 GHz to 12 GHz, and the peak value reaches -22 dB.

specific Embodiment approach 3

[0040] A high temperature resistant electromagnetic wave absorbing coating, which is composed of aluminum dihydrogen phosphate, magnesium oxide, aluminum oxide and crystalline silicon, and the components are mutually fused according to the following mass percentages:

[0041] Aluminum dihydrogen phosphate 12.6

[0042] Magnesium oxide 0.7

[0043] Aluminum oxide 0.7

[0044] Crystalline silicon 86

[0045] Spray on an aluminum plate with a size of (20*20 cm) by spraying method and form a high temperature resistant wave-absorbing coating with a thickness of 1.3 mm.

[0046] The high temperature resistant electromagnetic wave absorbing coating can be obtained through the above preparation steps. At this time, the performance of the coating is stable at 800° C., and its reflectivity is lower than -5 dB at 10 GHz to 14 GHz, and the peak value reaches -35 dB.

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Abstract

The invention relates to a composite high-temperature-resistant wave-absorbing coating material and a preparation method of a wave-absorbing coating, belonging to the technical field of electronic materials. The composite high-temperature-resistant wave-absorbing coating material provided by the invention is prepared by mixing the following components in percentage by mass: 12.6-18% of aluminum dihydrogen phosphate, 0.7-1% of magnesium oxide, 0.7-1% of aluminum oxide and 80-86% of crystal silicon, wherein deionized water is used as a solvent. The coating provided by the invention has the advantages of favorable heat resistance and excellent wave-absorbing performance.

Description

technical field [0001] The invention belongs to the technical field of electronic materials, and in particular relates to a high-temperature resistant dielectric electromagnetic wave absorbing coating and its preparation technology. Background technique [0002] The parts of weapons and equipment that need to be invisible are divided according to the working temperature, which can be divided into two categories: normal temperature and high temperature. Because most of the magnetic absorbents have a low Curie temperature, they lose their magnetism at high temperatures and thus lose their wave-absorbing properties. Therefore, the high-temperature parts of weapons The stealth must use high temperature absorbing material. Since the high-temperature absorbing material only relies on the electrical loss of the material to absorb electromagnetic waves, its absorbing efficiency is much lower than that of the magnetic absorbing material, which requires the high-temperature absorbing ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C04B28/34
CPCC04B28/342C04B14/04C04B14/303C04B22/066
Inventor 谢建良纪永辉陈良邓龙江梁迪飞
Owner 成都佳驰电子科技股份有限公司
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