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High-compactness and high-strength quartz ceramic-based composite material and preparation method thereof

A technology of quartz ceramics and composite materials, applied in the field of high-density and high-strength quartz-ceramic matrix composites and their preparation, can solve the problems of brittleness limitation of quartz ceramics, and achieve small thermal expansion coefficient, low dielectric constant and low loss tangent value, the effect of improving the density

Inactive Publication Date: 2021-05-04
徐州康纳高新材料科技有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

The brittleness of quartz ceramics limits its application in aerospace materials to a certain extent.

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0033] The following is the preparation method of the high-density and high-strength quartz ceramic matrix composite material, including the following steps:

[0034] (1) Preparation of BN nanosheets: according to the formula, 0.25 parts of ammonium sulfate, 0.20 parts of sodium borohydride, and 0.01 parts of reduced graphene oxide; weigh ammonium sulfate, sodium borohydride, and reduced graphene oxide, and grind Make the mixture uniform; put the above-mentioned uniformly mixed reactants into a stainless steel high-pressure reactor, then seal the reactor, place it in a crucible resistance furnace, heat it to 600 ° C, and keep it warm for 12 hours. Furnace is cooled to room temperature; After cooling, open reactor, after taking out, carry out repeated washing with hydrochloric acid and deionized water, obtain BN nanosheet;

[0035] Then, carry out hydroxyl modification to BN nano-sheet, the hydroxyl modification of described BN nano-sheet, comprises the following steps: the aqu...

Embodiment 2

[0041] (2) Preparation of BN nanosheets: according to the formula, 0.30 parts of ammonium sulfate, 0.20 parts of sodium borohydride, and 0.02 parts of reduced graphene oxide; weigh ammonium sulfate, sodium borohydride, and reduced graphene oxide, and grind Make the mixture uniform; put the above-mentioned uniformly mixed reactants into a stainless steel high-pressure reaction kettle, then seal the reaction kettle, place it in a crucible resistance furnace, heat it to 600 ° C, and keep it warm for 1 hour. Furnace is cooled to room temperature; After cooling, open reactor, after taking out, carry out repeated washing with hydrochloric acid and deionized water, obtain BN nanosheet;

[0042] Then, carry out hydroxyl modification to BN nano-sheet, the hydroxyl modification of described BN nano-sheet, comprises the following steps: the aqueous solution of BN nano-sheet and sodium hydroxide is mixed homogeneously, then transfers to the stainless steel ball mill tank, ball mills 20h wi...

Embodiment 3

[0048] (3) Preparation of BN nanosheets: according to the formula, 0.32 parts of ammonium sulfate, 0.18 parts of sodium borohydride, and 0.015 parts of reduced graphene oxide; weigh ammonium sulfate, sodium borohydride, and reduced graphene oxide, and grind Make the mixture uniform; put the above-mentioned uniformly mixed reactants into a stainless steel high-pressure reaction kettle, then seal the reaction kettle, place it in a crucible resistance furnace, heat it to 650 ° C, and keep it warm for 12 hours. Furnace is cooled to room temperature; After cooling, open reactor, after taking out, carry out repeated washing with hydrochloric acid and deionized water, obtain BN nanosheet;

[0049] Then, carry out hydroxyl modification to BN nano-sheet, the hydroxyl modification of described BN nano-sheet, comprises the following steps: the aqueous solution of BN nano-sheet and sodium hydroxide is mixed homogeneously, then transfers to the stainless steel ball mill jar, ball mills 24h ...

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PUM

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Abstract

The invention relates to a high-compactness and high-strength quartz ceramic-based composite material and a preparation method thereof, and the quartz ceramic-based composite material is mainly composed of the following components in parts by mass: 90-95 parts of amino modified fused quartz, 2-3 parts of N-hydroxymethyl acrylamide, 1-2 parts of carbon fiber, 1 to 1.5 parts of N, N-methylene bisacrylamide, 0.5 to 1 part of ammonium citrate, 0.5 to 1 part of sodium carboxymethyl cellulose, 0.5 to 1 part of epoxy resin, 0.25 to 0.35 part of ammonium sulfate, 0.15 to 0.20 part of sodium borohydride and 0.01 to 0.02 part of reduced graphene oxide. According to the high-compactness and high-strength quartz ceramic-based composite material and the preparation method thereof, the formula setting is reasonable, and the defects of brittleness and mechanical properties of quartz ceramic are overcome through the synergistic effect of the carbon fibers, the BN nanosheets prepared from the ammonium sulfate, the sodium borohydride and the reduced graphene oxide; meanwhile, the quartz ceramic matrix composite material has the advantages of excellent thermal shock resistance, low dielectric constant, low loss angle tangent value, small thermal expansion coefficient and the like, and is simple in preparation process and wide in application prospect.

Description

technical field [0001] The invention belongs to the technical field of quartz ceramic-based composite materials, and in particular relates to a high-density and high-strength quartz ceramic-based composite material and a preparation method thereof. Background technique [0002] Quartz ceramic materials are widely used because of their good thermal shock resistance, low and stable dielectric constant and loss tangent, low thermal expansion coefficient and low preparation cost. At present, the demand for high-performance quartz ceramic materials in aerospace and other military fields still accounts for a large proportion, which is mainly due to special application scenarios and performance requirements. Inevitably, great frictional heat will be generated and the surface temperature will rise. The electronic components and wireless devices inside the aircraft are relatively fragile, and must be protected by adding a heat insulation layer. In certain parts, the built-in wireles...

Claims

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Application Information

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IPC IPC(8): C04B35/80C04B35/14C04B35/622
CPCC04B35/14C04B35/622C04B2235/386C04B2235/6562C04B2235/6567C04B2235/77C04B2235/96C04B2235/9607
Inventor 王永江陈辉
Owner 徐州康纳高新材料科技有限公司