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Double-body composite ceramic antenna cover body and preparation method thereof

A composite ceramic and radome technology, which is applied to antennas, antenna parts, radiation unit covers, etc., can solve the problems of high raw material cost, limited application scope, long preparation period, etc., to reduce production costs, improve ablation resistance and High temperature resistance and material cost reduction effect

Active Publication Date: 2016-10-12
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

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Problems solved by technology

However, with the development of missile weapons in the direction of high Mach and long endurance, the requirements for high temperature resistance and ablation resistance of radome are greatly improved. The current quartz composite ceramic materials are gradually unable to meet the requirements of ablation resistance performance, which limits its application. scope
In addition, the current preparation of the radome cover still has the problems of high raw material cost and long production cycle.

Method used

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  • Double-body composite ceramic antenna cover body and preparation method thereof
  • Double-body composite ceramic antenna cover body and preparation method thereof

Examples

Experimental program
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Effect test

Embodiment 1

[0028] A method for preparing a double-matrix composite ceramic radome cover body, comprising the steps of:

[0029] 1) Preparation of fiber prefabricated body: according to the size of the radome cover, use quartz fiber bundles to weave into a fiber prefabricated body with a 2.5D weaving structure profiling, with a cone angle of 35°, a height of 300mm, and a wall thickness of 10mm;

[0030] 2) Pretreatment of the fiber preform: the obtained fiber preform is subjected to boiling and roasting treatment in sequence, wherein the boiling treatment is boiled with boiling high-purity water for 5 hours, and the roasting treatment is roasted with oxygen at a temperature of 350°C.

[0031] 3) Impregnation and compounding of fiber preforms: immerse the pretreated fiber preforms in a density of 1.12g / cm 3 In the high-purity silica sol (the temperature of high-purity silica sol is 50°C), vacuumize for 0.2h first, and the vacuum degree of vacuum treatment is -0.06Mpa, then take out the fib...

Embodiment 2

[0037] A method for preparing a double-matrix composite ceramic radome cover body, comprising the steps of:

[0038] 1) Preparation of fiber prefabricated body: According to the size of the radome cover, weave a fiber prefabricated body with a 2.5D braided structure profiling, with a cone angle of 35°, a height of 300mm, and a wall thickness of 10mm;

[0039] 2) Pretreatment of the fiber preform: the obtained fiber preform is subjected to boiling and roasting treatment in sequence, wherein the boiling treatment is boiled with boiling high-purity water for 6 hours, and the roasting treatment is roasted with oxygen at a temperature of 450°C.

[0040] 3) Impregnation and compounding of fiber preform: immerse the pretreated fiber preform in a density of 1.30g / cm 3 In the high-purity silica sol (the temperature of the high-purity silica sol is 70°C), vacuum treatment is carried out for 0.8h, and the vacuum degree of vacuum treatment is -0.08Mpa, and then the fiber preform is taken ...

Embodiment 3

[0046] A method for preparing a double-matrix composite ceramic radome cover body, comprising the steps of:

[0047] 1) Preparation of fiber prefabricated body: according to the size of the radome cover, use quartz fiber bundles to weave into a fiber prefabricated body with a 2.5D weaving structure profiling, with a cone angle of 35°, a height of 300mm, and a wall thickness of 10mm;

[0048] 2) Pretreatment of the fiber preform: the obtained fiber preform is subjected to boiling and roasting treatment in sequence, wherein the boiling treatment is boiled with boiling high-purity water for 5.5 hours, and the roasting treatment is roasted with oxygen at a temperature of 400°C .

[0049] 3) Impregnation and compounding of fiber preform: immerse the pretreated fiber preform in a density of 1.21g / cm 3 In the high-purity silica sol (the temperature of high-purity silica sol is 60°C), vacuumize for 0.4h first, and the vacuum degree of vacuum treatment is -0.07Mpa, then take out the f...

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Abstract

The invention discloses a double-body composite ceramic antenna cover body and a preparation method thereof. The preparation method of the double-body composite ceramic antenna cover body includes the first step of preparation of a fiber preform, the second step of preprocessing of the fiber preform, the third step of impregnating and compositing of the fiber preform, the fourth step of high-temperature sintering of an initial blank, the fifth step of impregnating and compositing of a middle blank, the sixth step of high-temperature pyrolysis of a cover blank and the seventh step of machining and forming. According to the double-body composite ceramic antenna cover body, quartz fiber bundles serve as reinforcing bodies, silicon dioxide and silicon nitride serve as double bodies, ablation resistance and high temperature resistance of the antenna cover body can be effectively improved, cost is low, and the preparation period is short.

Description

technical field [0001] The invention relates to the technical field of preparation of wave-transparent composite ceramic materials for missiles, in particular to a double-matrix composite ceramic radome cover body and a preparation method thereof. Background technique [0002] The radome is the outer shell that protects the internal antenna from the harsh external environment. The missile radome plays the role of wave penetration, heat protection, load bearing and anti-ablation during the high-speed flight of the missile, ensuring that the radar system is accurate to the transmission coefficient and aiming error. and antenna pattern distortion and other electrical performance requirements. [0003] Supersonic missiles have the characteristics of high-temperature sound velocity, and radome is easily affected by thermal vibration due to the increase of surface temperature. Quartz composite ceramic material has the characteristics of high temperature resistance and ablation res...

Claims

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Application Information

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IPC IPC(8): C04B35/80C04B35/14C04B35/584C04B35/622H01Q1/42
CPCC04B35/14C04B35/584C04B35/622C04B35/80C04B2235/5232C04B2235/5256H01Q1/422
Inventor 吴广力佘平江郭培江王芬
Owner 湖北三江航天江北机械工程有限公司
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