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Broadband wave-transparent double-layer composite ceramic radome cover body and preparation method thereof

A double-layer composite, ceramic antenna technology, applied in the directions of the antenna, antenna parts, radiation unit cover, etc., can solve the problems of low connection strength of the cover body, limited application range, low assembly accuracy, etc. The effect of ensuring strength and electrical properties, and improving the speed of ceramic densification

Active Publication Date: 2019-03-26
湖北三江航天江北机械工程有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0003] At present, in order to realize the double-layer and multi-layer cover structure, most of the single-layer covers are molded separately and then assembled layer by layer. However, this method has the disadvantages of low connection strength between covers, low assembly accuracy, and high cost. range of application

Method used

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  • Broadband wave-transparent double-layer composite ceramic radome cover body and preparation method thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0031] A method for preparing a broadband wave-transparent double-layer composite ceramic radome cover body, comprising the following steps:

[0032] 1) Weaving of profiling fabric: According to the structural size of the double-layer cover body of the radome, determine the inner and outer structural dimensions of the profiling fabric (the thickness of the profiling fabric is 24mm); first use hollow quartz fiber cloth (thickness is 0.5mm) and hollow quartz fiber mesh tire (area density 50g / cm 2 ) to form an inner layer by profiling and alternate laying layers, and then lay a diaphragm layer (thickness 0.05mm) formed by a polytetrafluoroethylene film on the outer surface of the inner layer, and then use a solid quartz fiber cloth ( The thickness is 0.5mm) and the layer is stitched into the outer layer, and finally the overall stitching forms an integrated profiling fabric;

[0033] 2) Pretreatment of the profiling fabric: soak the profiling fabric in analytical pure acetone fo...

Embodiment 2

[0042] A method for preparing a broadband wave-transparent double-layer composite ceramic radome cover body, comprising the following steps:

[0043] 1) Weaving of profiling fabric: According to the structural size of the double-layer cover body of the radome, determine the inner and outer structural dimensions of the profiling fabric (thickness of the profiling fabric is 40mm); first use hollow quartz fiber cloth (thickness of 0.5mm) and hollow quartz fiber mesh tire (area density 50g / cm 2 ) to form an inner layer by profiling and alternate laying layers, and then lay a diaphragm layer (thickness 0.05mm) formed by a polytetrafluoroethylene film on the outer surface of the inner layer, and then use a solid quartz fiber cloth ( The thickness is 0.5mm) and the layer is stitched into the outer layer, and finally the overall stitching forms an integrated profiling fabric;

[0044] 2) Pretreatment of the profiling fabric: soak the profiling fabric in analytically pure acetone for ...

Embodiment 3

[0053] A method for preparing a broadband wave-transparent double-layer composite ceramic radome cover body, comprising the following steps:

[0054] 1) Weaving of profiling fabric: According to the structural size of the double-layer cover body of the radome, determine the inner and outer structural dimensions of the profiling fabric (thickness of the profiling fabric is 20mm); first use hollow quartz fiber cloth (thickness of 0.1mm) and hollow quartz fiber mesh tire (area density 30g / cm 2 ) to form an inner layer by profiling and alternately laying layers, and then lay a diaphragm layer (0.03mm in thickness) formed by a polytetrafluoroethylene film on the outer surface of the inner layer, and then use a solid quartz fiber cloth ( The thickness is 0.1mm) and the layer is stitched into the outer layer, and finally the overall stitching is formed to form an integrated profiling fabric;

[0055] 2) Pretreatment of the profiling fabric: soak the profiling fabric in analytical pu...

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Abstract

The invention discloses a cover body of a broadband wave-transmitting dual-layer composite ceramic antenna cover and a fabrication method for the cover body. The fabrication method for the cover body of the broadband wave-transmitting dual-layer composite ceramic antenna cover comprises the following steps of 1) weaving a shaped fabric; 2) pre-processing the shaped fabric; 3) impregnating an outer layer of the shaped fabric; 4) performing integral impregnation; 5) repeating to perform integral impregnation in the above step of 4) for two or three times; 6) sintering an intermediate blank; 7) roughly processing a cover body blank; 8) repeating to perform integral impregnation in the above step of 4) on the roughly-processed cover body blank for one time, and performing high-temperature sintering; and 9) finely processing an initial cover body. The shaped fabric of the cover body of the dual-substrate composite ceramic antenna cover is formed by laying and integratedly stitching a hollow quartz fiber fabric, a hollow quartz fiber felt and a solid quartz fiber fabric, the integral formation of the dual-layer composite ceramic antenna cover can be achieved, thus, the connection strength and the assembly accuracy of the cover body are improved, and the production cost is reduced.

Description

technical field [0001] The invention belongs to the technical field of preparation of broadband wave-transparent ceramic radome for missiles, and specifically refers to a broadband wave-transparent double-layer composite ceramic radome cover body and a preparation method thereof. Background technique [0002] The radome is a component used to protect the antenna inside the hood to work normally in harsh environments. At present, anti-radiation missiles require that the radome material must pass through electromagnetic waves at a wide frequency. In order to obtain broadband wave-transmitting performance of the radome, on the one hand, it is necessary to use a dielectric material with extremely low dielectric constant and extremely small dielectric loss, and on the other hand, the material has a special structure, such as a thin-walled structure and a sandwich structure. The broadband of the radome can be realized by adopting a thin-walled structure, and its wall thickness is...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): H01Q1/42C04B35/80C04B35/14C04B35/622
CPCC04B35/14C04B35/622C04B35/803C04B2235/5232C04B2235/5256H01Q1/42H01Q1/422
Inventor 吴广力张军佘平江孙晓莉尹正帅
Owner 湖北三江航天江北机械工程有限公司
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