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High-compactness quartz/quartz composite material and preparation method thereof

A composite material and quartz technology, applied in the processing of textile materials, liquid/gas/steam textile material processing, heating/cooling fabrics, etc., can solve the problems of low density of composite materials, difficulty in increasing material density, and insufficient mechanical properties , to achieve the effect of good uniformity, high density and excellent mechanical properties

Active Publication Date: 2019-12-10
NINGBO SHUXIANG NEW MATERIAL
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Problems solved by technology

[0004] The invention provides a high-density quartz / quartz composite material and a preparation method thereof, which are used to overcome the difficulty in increasing the material density for the relatively thick quartz fiber braids in the prior art, so that the composite material has low density, low Poor uniformity, insufficient mechanical properties and other defects, realize the preparation of different thicknesses of quartz fiber braids, especially the high density of composite materials with large thickness of quartz fiber braids, and the prepared composite materials have high density, good uniformity and excellent mechanical properties

Method used

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  • High-compactness quartz/quartz composite material and preparation method thereof

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preparation example Construction

[0019] The present invention proposes a preparation method of high-density quartz / quartz composite material, see figure 1 , including the following steps:

[0020] S1: Soak the quartz fiber braid in an organic solvent to remove dust, organic matter and other impurities on the surface of the quartz fiber braid, and dry it for later use after soaking;

[0021] The weaving method of the quartz fiber braid is 2.5D weaving or three-dimensional multi-directional weaving.

[0022] The thickness of the quartz fiber braid is woven into a suitable shape and size according to actual needs.

[0023] Preferably, in the step S1, the organic solvent is at least one of acetone, absolute ethanol and xylene.

[0024] Preferably, the time of the soaking treatment is 3-5 hours, and the soaking is repeated three times to ensure that the dust, organic matter and other impurities on the surface of the quartz fiber braid are completely removed.

[0025] S2: Vacuum impregnating and microwave vacuum...

Embodiment 1

[0036] This embodiment provides a high-density quartz / quartz composite material, the composite material uses quartz fiber braids as a reinforcing phase and silica as a matrix; the volume fraction of quartz fiber braids in the composite material is 43% ; The composite material can be applied to radome and other aerospace fields.

[0037] This embodiment also provides a method for preparing a high-density quartz / quartz composite material, comprising the following steps:

[0038]S1: Soak the 30mm thick 2.5D structured quartz fiber braid in the organic solvent acetone, soak for 5 hours each time, repeat the soaking 3 times, and dry it after soaking;

[0039] S2: Put the quartz fiber braid that has passed step S1 into an impregnation tank to perform 5 vacuum impregnation and microwave vacuum drying processes;

[0040] The impregnating agent for the vacuum impregnation is a silica sol solution with a silica sol mass fraction of 22wt%, and the impregnation time is 14 hours at room t...

Embodiment 2

[0045] This embodiment provides a high-density quartz / quartz composite material, the composite material uses quartz fiber braids as a reinforcing phase and silica as a matrix; the volume fraction of quartz fiber braids in the composite material is 47% ; The composite material can be applied to radome and other aerospace fields.

[0046] This embodiment also provides a method for preparing a high-density quartz / quartz composite material, comprising the following steps:

[0047] S1: Soak the 25mm thick 2.5D structured quartz fiber braid in the mixture of organic solvent acetone and xylene, each soaking time is 3h, repeat the soaking 3 times, and dry it after soaking;

[0048] S2: Put the quartz fiber braid after step S1 into an impregnation tank for 6 vacuum impregnation-microwave vacuum drying processes;

[0049] The impregnating agent for the vacuum impregnation is a silica sol solution with a silica sol mass fraction of 18wt%, and the impregnation time is 16 hours at room te...

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Abstract

The invention discloses a high-compactness quartz / quartz composite material and a preparation method thereof. The preparation method comprises the steps that a quartz fiber braided fabric is pretreated; the quartz fiber braided fabric is subjected to vacuum impregnation and microwave vacuum drying many times; ceramic treatment is conducted, and finally the quartz / quartz composite material is obtained. The provided preparation method is short in preparation period, simple in process, easy to implement, low in cost and suitable for preparation of large-thickness-fiber-reinforced silicon dioxideceramic composite materials; the composite material prepared by adopting the preparation method is high in compactness, good in uniformity, excellent in mechanical performance and capable of being applied to antenna housings and other aerospace fields.

Description

technical field [0001] The invention relates to the technical field of ceramic matrix composite materials and preparation thereof, in particular to a high-density quartz / quartz composite material and a preparation method thereof. Background technique [0002] Quartz fiber reinforced quartz ceramic composite material (quartz / quartz composite material) is a series of excellent comprehensive properties such as heat insulation and wave penetration, high mechanical strength, low dielectric constant and loss, impact resistance, and low density. The composite material is widely used in the fields of high temperature wave penetration and heat insulation, and is the main preferred material for making radome. [0003] At present, quartz / quartz composite materials are mainly prepared by the sol-gel process, that is, the quartz fiber braid is prepared by repeatedly impregnating silica sol. Because the mass fraction of silica sol solution is generally low and the impregnation efficiency...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): D06B3/10D06B9/00D06B15/00D06C7/04D06M11/79
CPCD06B3/10D06B15/00D06B9/00D06C7/04D06M11/79
Inventor 郏保琪李瑞黄慧张雄军
Owner NINGBO SHUXIANG NEW MATERIAL
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