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A kind of quartz fiber reinforced quartz-based composite material and its manufacturing method

A composite material and quartz fiber technology, which is applied in the field of high-temperature-resistant wave-transparent composite material preparation, achieves the effects of simple equipment, wide range of raw materials, and improved densification efficiency

Active Publication Date: 2021-11-30
NINGBO SHUXIANG NEW MATERIAL
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  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0007] The present invention aims at the need to improve SiO 2f / SiO 2 densification efficiency during fabrication, thereby reducing the SiO 2f / SiO 2 To solve the problem of product preparation cost, a quartz fiber reinforced quartz matrix composite material and its manufacturing method are provided, that is, a SiO 2f / SiO 2 Composite material and its manufacturing method

Method used

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  • A kind of quartz fiber reinforced quartz-based composite material and its manufacturing method
  • A kind of quartz fiber reinforced quartz-based composite material and its manufacturing method
  • A kind of quartz fiber reinforced quartz-based composite material and its manufacturing method

Examples

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Effect test

Embodiment 1

[0041] A method for manufacturing a quartz fiber reinforced quartz-based composite material, comprising the following steps:

[0042] 1) Preparation of fiber prefabricated parts: Quartz fiber slabs are prepared as prefabricated parts by 2.5D weaving method, the fiber volume fraction is 35%, and the length, width and height are 100mm×100mm×20mm; SiO 2f / SiO 2 The density of the composite material flat plate is required to be 1.65g / cm 3 ;

[0043] Soak the quartz fiber preform in acetone for 10 hours each time, and then dry it in an oven at 100°C for 2 hours to remove the wetting agent and impurities on the surface of the fiber. Repeat "soaking-drying" 3 times, each time Soak and replace with new acetone;

[0044] 2) Pour 2 kg of commercially available acidic silica sol with a solid content of 25%, pH = 2, and a viscosity of less than 10 mPa·s into the flask matched with the rotary evaporator, connect the flask to the rotary evaporator, and evacuate to 6×10 -2 MPa, check the...

Embodiment 2

[0052] A method for manufacturing a quartz fiber reinforced quartz-based composite material, comprising the following steps:

[0053] 1) Preparation of fiber preforms:

[0054] The quartz fiber plate is prepared as a prefabricated part by laying up and suturing, the fiber volume fraction is 50%, and the length, width and height are 100mm×100mm×20mm; SiO 2f / SiO 2 The density of the composite material flat plate is required to be 1.75g / cm 3 ;

[0055] Soak the quartz fiber preform in acetone for 10 hours each time, and then dry it in an oven at 100°C for 2 hours to remove the wetting agent and impurities on the surface of the fiber. Repeat "soaking-drying" 3 times, each time Soak and replace with new acetone;

[0056] 2) Pour 2kg of commercially available acidic silica sol with a solid content of 20%, pH = 4, and a viscosity of less than 10mPa·s into the flask matched with the rotary evaporator, connect the flask to the rotary evaporator, and evacuate to 6×10 -2 MPa, check...

Embodiment 3

[0064] A method for manufacturing a quartz fiber reinforced quartz-based composite material, comprising the following steps:

[0065] 1) Preparation of fiber prefabricated parts: Quartz fiber slabs were prepared as prefabricated parts by 2D puncture, the fiber volume fraction was 45%, and the length, width and height were 100mm×100mm×20mm; SiO 2f / SiO 2 The density requirement of the composite plate is 1.70g / cm 3 ;

[0066] Soak the quartz fiber preform in acetone for 10 hours each time, and then dry it in an oven at 100°C for 2 hours to remove the wetting agent and impurities on the surface of the fiber. Repeat "soaking-drying" 3 times, each time Soak and replace with new acetone;

[0067] 2) Pour 2 kg of commercially available acidic silica sol with a solid content of 23%, pH = 3, and a viscosity of less than 10 mPa·s into the flask matched with the rotary evaporator, connect the flask to the rotary evaporator, and evacuate to 6×10 -2 MPa, check the air tightness, under ...

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Abstract

The invention discloses a quartz fiber-reinforced quartz-based composite material and a manufacturing method thereof. The commercially available acidic silica sol is concentrated by vacuum rotary evaporation to obtain concentrated silica sol with a concentration of 30%-47%, and the concentrated Silica sol is divided into high-concentration silica sol and medium-concentration silica sol according to different concentration ranges, and a combined impregnation scheme with different concentrations of silica sol is designed for different densification cycles. Compared with the normal pressure heating and concentration method, the concentration efficiency of the vacuum rotary evaporation method is high, the obtained concentrated silica sol has good stability, and the size of the micelles contained is small, which is beneficial to the full impregnation of the fiber preform. The combined impregnation scheme adopted improves the densification efficiency, thereby achieving a SiO 2f / SiO 2 Efficient preparation of composite materials.

Description

technical field [0001] The invention belongs to the technical field of preparation of high-temperature-resistant wave-transmitting composite materials, and in particular relates to a quartz fiber-reinforced quartz-based composite material and a manufacturing method thereof, that is, a SiO 2f / SiO 2 Composite materials and methods of manufacture. Background technique [0002] High-temperature resistant wave-transparent materials are a kind of multifunctional dielectric materials widely used in missiles, aerospace aircraft, launch vehicles and reusable aircraft. They are mainly used to manufacture radome and antenna window structures on various aircraft. It realizes the efficient transmission and effective communication of electromagnetic waves, protects the internal guidance system, and is a structural-functional component integrating "wave transmission-carrying-radiation". [0003] As the flight speed of aircraft continues to increase, higher requirements are placed on the...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C04B30/02C04B14/42
CPCC04B30/02C04B14/42C04B2201/20C04B14/062
Inventor 袁钦周永江郏保琪
Owner NINGBO SHUXIANG NEW MATERIAL
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