Preparation method of vacuum heat-insulation material used at high temperature of 1,000 to 2,200DEG C

A vacuum heat insulation material and high temperature technology, which is applied in heat exchange equipment, heat preservation, mechanical equipment, etc., can solve the problem of low temperature of vacuum heat insulation materials, and achieve the effect of reducing material thickness and dense surface

Active Publication Date: 2015-12-30
SUZHOU HONGJIU AVIATION THERMAL MATERIALS TECH CO LTD
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Problems solved by technology

[0004] The technical problem to be solved by the present invention is to overcome the limitation of the low use temperature of the existing vacuum heat insulation materials, and provide a preparation method of vacuum heat insulation materials that can be used under high temperature conditions of 1000°C~2200°C

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  • Preparation method of vacuum heat-insulation material used at high temperature of 1,000 to 2,200DEG C

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Embodiment 1

[0015] The method for preparing a vacuum insulation material with alumina ceramic foam as the core material that can be used above 1400°C is as follows:

[0016] (1) Wrap a carbon fiber shell on the outer surface of alumina ceramic foam to form a prefabricated part. The porosity of alumina ceramic foam is 70%, and the carbon fiber shell is composed of carbon fiber prepreg;

[0017] (2) Put the prefabricated part into a vacuum chemical vapor deposition furnace, raise the temperature to 1200°C, pass in propylene, and infiltrate the carbon generated by the decomposition of propylene into the shell through the chemical vapor infiltration method, so that the shell becomes a C / C composite material skeleton , the porosity of the shell is 10%;

[0018] (3) Stop feeding propylene, feed monochloromethylsilane, dichloromethylsilane, and trichloromethylsilane in sequence, and infiltrate the carbon and silicon generated by the decomposition of silane into the C / C composite material skeleto...

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Abstract

The invention discloses a preparation method of a vacuum heat-insulation material used at the high temperature of 1,000 to 2,200DEG C. The preparation method comprises the following steps of firstly, winding a carbon fiber casing on the outer surface of a core material of a low-heat-conduction-coefficient material to form a prefabricated member; secondly, placing the prefabricated member into a vacuum chemical vapor deposition furnace; enabling the casing to be turned into a C / C composite material framework by using a chemical vapor infiltration method, sequentially introducing chloromethylsilane, dichloromethylsilane and trichloromethylsilane; infiltrating carbon and silicon generated by decomposing silicane into the C / C composite material framework by the chemical vapor infiltration method; fully densifying the casing to obtain a test piece. The material prepared by the preparation method has no air leakage phenomenon, is dense in surface and is free from defects; in a process of low pressure chemical vapor infiltration, the inside is enabled to reach the vacuum state while an outer-layer structure is densified, and no after treatment is needed.

Description

technical field [0001] The invention relates to a method for preparing a heat insulating material, in particular to a method for preparing a vacuum heat insulating material used at a high temperature of 1000°C to 2200°C. Background technique [0002] Environmental pollution and energy crisis have become worldwide problems, and energy conservation is particularly important in the fields of thermal insulation technology, cryogenic storage, and refrigeration engineering. The research and development of environmentally friendly, energy-saving, and high-efficiency thermal insulation materials is an effective solution. Vacuum insulation panels are a new type of insulation material developed and researched in recent years, and the barrier film used in traditional vacuum insulation panels is generally composed of nylon protective layer, aluminum foil layer and polyethylene heat-sealing layer. , the vacuum insulation panel made has extremely low thermal conductivity, but this materi...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C04B35/80C04B35/83C04B35/565C04B35/622F16L59/02F16L59/065
Inventor 陈照峰汪洋
Owner SUZHOU HONGJIU AVIATION THERMAL MATERIALS TECH CO LTD
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