Heat-insulation-and-bearing-integrated carbon aerogel and ceramic layered composite material and preparation method and application thereof

A layered composite material, carbon airgel technology, applied in ceramic products, applications, other household appliances, etc., can solve the problems of low density, low thermal conductivity, high strength, etc., and achieve the effect of good ablation resistance

Active Publication Date: 2017-12-15
INST OF METAL RESEARCH - CHINESE ACAD OF SCI
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0004] The purpose of the present invention is to address the deficiencies in the prior art, to provide a kind of anti-heat insulation, load-carrying integrated carbon airgel / ceramic layered composite material and its preparation method and application, on high-strength carbon aerogel Through multi-level oxidation protection, the integrated carbon airgel / ceramic layered composite material with anti-heat insulation and load bearing is obtained. This material has good anti-ablation and anti-oxidation properties, low thermal conductivity, high strength, low density, and The high temperature performance can reach 1800 ℃, etc. At the same time, according to the actual needs, the density, porosity, mechanical properties, anti-oxidation and other properties of the composite material can be adjusted through process adjustment, so as to realize the different types of aircraft in the aerospace field. material requirements

Method used

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  • Heat-insulation-and-bearing-integrated carbon aerogel and ceramic layered composite material and preparation method and application thereof
  • Heat-insulation-and-bearing-integrated carbon aerogel and ceramic layered composite material and preparation method and application thereof
  • Heat-insulation-and-bearing-integrated carbon aerogel and ceramic layered composite material and preparation method and application thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0043] 1. Preparation of high-strength carbon airgel bulk layer:

[0044] Mix resorcinol, 37wt.% formaldehyde solution, deionized water, and anhydrous sodium carbonate at a mass ratio of 2637:2637:5776:1 and heat in a water bath. When the temperature of the water bath is adjusted to 15°C, the holding time 30 hours; when the temperature of the water bath is adjusted to 45°C, the holding time is 20 hours; when the temperature of the water bath is adjusted to 65°C, the holding time is 20 hours; when the temperature of the water bath is adjusted to 95°C, the holding time is 10 hours to obtain a wet gel. The obtained wet gel was soaked in absolute ethanol 10 times the volume of the gel at 50°C for 24 hours, and this step was repeated 4 times. Afterwards, the wet gel was dried at 50 °C for 7 days in an atmospheric drying oven. The dried gel was placed in a carbonization furnace under the protection of argon, and the temperature was raised from room temperature to 900°C at a heating...

Embodiment 2

[0055] The difference from Example 1 is that the preparation process of the high-strength carbon airgel body layer is different, as follows:

[0056] Mix resorcinol, 37wt.% formaldehyde solution, deionized water, and anhydrous sodium carbonate at a mass ratio of 1030:1530:2880:1 to obtain a mixed solution and heat it in a water bath, and adjust the temperature of the water bath to 30°C When the temperature of the water bath is adjusted to 50°C, the holding time is 50 hours; when the temperature of the water bath is adjusted to 75°C, the holding time is 30 hours; when the temperature of the water bath is adjusted to 95°C, the holding time is 10 hours. wet gel. The obtained wet gel was soaked in absolute ethanol 10 times the volume of the gel at 50°C for 24 hours, and this step was repeated 4 times. Afterwards, the obtained wet gel was dried in an atmospheric drying oven at 50°C for 7 days. The dried gel was placed in a carbonization furnace under the protection of argon, and ...

Embodiment 3

[0060] The difference from Example 1 is that the preparation process of the high-strength carbon airgel body layer is different, as follows:

[0061] Mix resorcinol, 37wt.% formaldehyde solution, deionized water, and anhydrous sodium carbonate in a mass ratio of 520:760:1440:1 and heat in a water bath: when the temperature of the water bath is adjusted to 45°C, keep warm The time is 80 hours; when the temperature of the water bath is adjusted to 65°C, the holding time is 70 hours; when the temperature of the water bath is adjusted to 95°C, the holding time is 50 hours to obtain a wet gel. Soak the obtained wet gel in absolute ethanol 10 times the volume of the gel at 50° C. for 24 hours, and repeat this step 4 times. Afterwards, the obtained wet gel was dried in an atmospheric drying oven at 50°C for 7 days. The dried gel was placed in a carbonization furnace under the protection of argon, and the temperature was raised from room temperature to 900°C at a heating rate of 5°C / ...

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Abstract

The invention discloses a heat-insulation-and-bearing-integrated carbon aerogel and ceramic layered composite material and a preparation method and application thereof, and belongs to the technical field of a carbon aerogel and ceramic composite material. The composite material comprises a high-strength carbon aerogel body layer, a function gradient SiC and carbon aerogel transition layer, and a superhigh-temperature ceramic and SiC antioxidant composite coating. The high-strength carbon aerogel body layer is made through five steps of solution preparation, sol-gel, solvent replacement, normal-pressure drying and high-temperature carbonization through normal-pressure drying technology. The function gradient SiC and carbon aerogel transition layer is made by deep deposition of SiC on a carbon aerogel surface through a chemical vapor infiltration process. The superhigh-temperature ceramic and SiC antioxidant composite coating is made through compound technology of spraying and chemical vapor deposition. The composite material is good in ablation and oxidation resistance, low in thermal conductivity and density, and high in strength, can resist high temperature as high as 1800 DEG C, and is suitable for heat-insulation materials of aircrafts.

Description

technical field [0001] The invention relates to the technical field of carbon aerogel / ceramic composite material and its preparation, in particular to an integrated carbon aerogel / ceramic layered composite material with anti-heat insulation and load bearing and its preparation method and application. Background technique [0002] With the development of aerospace technology, the flight speed of aerospace vehicles has been increased again and again, which will inevitably lead to an increase in the service temperature of the surface of the aircraft, which will bring higher challenges to the anti-heat insulation system. The new generation of aerospace vehicles needs to withstand a more severe service environment than conventional aircraft, and its main feature is that it withstands high aerodynamic heating temperature and aerodynamic pressure in an aerobic environment for a long time. Therefore, it is required that the anti-insulation material should have ultra-light weight; no...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C04B38/00C04B35/66C04B35/52C04B41/89
CPCC04B35/52C04B35/66C04B38/0045C04B41/009C04B41/52C04B41/89C04B2235/3826C04B2235/614C04B2235/775C04B41/5035C04B41/4543C04B41/5059C04B41/4531
Inventor 汤素芳杨鸷胡成龙庞生洋成会明
Owner INST OF METAL RESEARCH - CHINESE ACAD OF SCI
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