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High pressure-resistant thermal insulation material and preparation method thereof

A thermal insulation material and high-temperature treatment technology, applied in the field of thermal insulation materials, can solve the problems of high thermal conductivity, inability to meet the high compressive strength, high temperature resistance, heat insulation and poor compressive performance of aerospace vehicles at the same time, and achieve low thermal conductivity coefficient, good application prospects, and the effect of little environmental pollution

Active Publication Date: 2015-04-22
AEROSPACE INST OF ADVANCED MATERIALS & PROCESSING TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0003] At present, common heat insulation materials can be divided into flexible and rigid. Among them, flexible heat insulation materials have better heat resistance and heat insulation performance. Poor, the compressive strength is usually 0.1W / m K
It can be seen that the above two types of heat insulation materials cannot meet the needs of high compressive strength and high temperature resistance heat insulation of aerospace vehicles at the same time.

Method used

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  • High pressure-resistant thermal insulation material and preparation method thereof
  • High pressure-resistant thermal insulation material and preparation method thereof
  • High pressure-resistant thermal insulation material and preparation method thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0022] An embodiment of the present invention provides a high-compression heat-insulation material, which is an airgel composite material composed of a fiber ceramic skeleton and a sol, and undergoes drying and post-treatment processes; for the sol, its In the present invention, it mainly plays the role of improving the compression resistance and heat insulation performance of the material. The use temperature of the airgel prepared from the sol used in the present invention must be close to or reach the target use environment temperature, for example, from room temperature to 1200° C. or even higher. The sol can be a commercially available product, such as zirconia sol and / or alumina sol. The fiber ceramic skeleton is composed of a fiber matrix and a reinforcing agent, and undergoes drying and high-temperature treatment. The reinforcing agent is used to improve the compression resistance of the material and increase the compression resistance of the fiber matrix. The fiber m...

Embodiment 2

[0029] An embodiment of the present invention provides a method for preparing the above-mentioned high-pressure heat-insulating material, including:

[0030] Step 1. Dispersing and molding the fibers into a block fiber matrix;

[0031] Step 2, compounding the fiber matrix with a reinforcing agent, drying and high-temperature treatment to obtain a fiber ceramic skeleton, and the reinforcing agent is used to increase the compression resistance of the fiber matrix;

[0032] Step 3: Composite the fiber ceramic skeleton with the sol, and obtain the high compressive heat insulation material through drying and post-processing.

[0033] In the method, the diameter of the fiber is between 1 μm and 15 μm, and the length is between 1 μm and 10 mm.

[0034] In this method, the reinforcing agent is one or more of methyl orthosilicate, ethyl orthosilicate, silica sol, ethylene glycol, water, hydrochloric acid, and ammonia according to the mass ratio A: B: C : D: E: F: G mixed combination,...

Embodiment 3

[0047] Prepare the high-compression heat insulation material of the present invention, wherein the fiber matrix skeleton is composed of quartz fibers (3-5 μm in diameter, 1-3 mm in length) and alumina fibers (5-8 μm in diameter, 1-3 mm in length).

[0048] Firstly, the above two kinds of fibers are mixed and dispersed, shaped and dried to form a fiber matrix. Then one or more of methyl orthosilicate, ethyl orthosilicate, silica sol, ethylene glycol, water, hydrochloric acid, ammonia water according to the mass ratio 0:100:0:300:150:3:400 It is mixed to make a reinforcing agent, and then the reinforcing agent is impregnated into the fiber matrix. After drying and high temperature treatment, a reinforced fiber ceramic skeleton can be obtained. The fiber ceramic skeleton and silica sol are compounded according to the mass ratio of 1:1.5, and the high compressive heat insulation material is obtained through steps such as drying and post-treatment.

[0049] Test sample performanc...

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Abstract

The embodiment of the invention provides a high pressure-resistant thermal insulation material and a preparation method thereof and relates to the technical field of thermal insulation materials. The preparation method is simple and convenient to operate and causes little pollution to the environment. The high pressure-resistant thermal insulation material has low heat conductivity coefficient and good temperature-resistant thermal insulation performance. The high pressure-resistant thermal insulation material is prepared by combining a fiber ceramic frame and sol and is subjected to drying and oven processing. The fiber ceramic frame is prepared by combining a fiber matrix and an enhancer and is subjected to drying and high-temperature processing. The fiber matrix is formed by dispersing at least one of quartz fiber, alumina fiber, mullite fiber and zirconia fiber to form a specific shape. The high pressure-resistant thermal insulation material is mainly used for aerospace industry, civil industry and the like.

Description

technical field [0001] The invention relates to the technical field of thermal insulation materials, in particular to a high-pressure thermal insulation material and a preparation method thereof. Background technique [0002] During the long-term high-speed cruise of modern aerospace vehicles in the atmosphere, as the Mach number continues to increase, the aircraft must bear the combined effects of aerodynamic loads and thermal loads. In order to ensure the integrity of the shape and structure of the aircraft and the normal operation of the internal components, an effective heat protection and heat insulation material is required to meet the requirements of high temperature resistance and heat insulation and high load-bearing strength at the same time. [0003] At present, common heat insulation materials can be divided into flexible and rigid. Among them, flexible heat insulation materials have better heat resistance and heat insulation performance. Poor, the compressive s...

Claims

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Application Information

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IPC IPC(8): C04B28/24C04B28/00C04B14/38
CPCC04B20/023C04B30/02C04B2201/20C04B2201/32C04B2201/50C04B14/4625C04B14/4631C04B14/064C04B14/4637C04B14/303C04B14/302
Inventor 宋寒刘斌张凡苏力军
Owner AEROSPACE INST OF ADVANCED MATERIALS & PROCESSING TECH
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