Quartz fiber reinforced quartz-based composite material and manufacturing method thereof

A composite material and quartz fiber technology, which is applied in the field of high temperature resistant wave-transmitting composite material preparation, achieves the effect of simple equipment, wide range of raw materials and alleviation of agglomeration

Active Publication Date: 2021-10-19
NINGBO SHUXIANG NEW MATERIAL
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  • Claims
  • Application Information

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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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  • Quartz fiber reinforced quartz-based composite material and manufacturing method thereof
  • Quartz fiber reinforced quartz-based composite material and manufacturing method thereof
  • Quartz fiber reinforced quartz-based composite material and manufacturing method thereof

Examples

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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 preparation method thereof. Commercially available acidic silica sol is concentrated by adopting a reduced pressure rotary evaporation mode to obtain concentrated silica sol with the 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 in which silica sol with different concentrations is adopted in different densification periods is designed. Compared with a normal-pressure heating concentration method and a reduced-pressure rotary evaporation method, the concentration efficiency is high, the obtained concentrated silica sol is good in stability, the size of contained micelles is small, and full impregnation of a fiber prefabricated part is facilitated; and the densification efficiency is improved through the adopted combined impregnation scheme, and therefore efficient preparation of the SiO2f / SiO2 composite material is achieved.

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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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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