Light efficient heat protection and insulation integrated thermal protection material and preparation method thereof

A thermal protection material and high-efficiency technology, applied in the field of high-temperature-resistant and heat-insulating materials, can solve the problems of low overall strength of materials and immature preparation technology of high-temperature-resistant and heat-resistant materials, so as to improve mechanical strength, improve heat insulation performance, and ensure normal The effect of using

Active Publication Date: 2020-11-10
SHANDONG RES & DESIGN ACADEMY OF IND CERAMICS
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0005] The technical task of the present invention is to address the above-mentioned existing problems, provide a light-weight, high-efficiency heat-insulating integrated thermal protection material and its preparation method, and solve the problems of immature preparation process of high-temperature-resistant heat-insulation materials and low overall strength of the material

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0029] A method for preparing a light-weight, high-efficiency heat-insulating integrated thermal protection material, the method includes the following process steps:

[0030] Preparation of high temperature resistant heat insulation tile: use pretreated quartz fiber and mullite fiber (fiber length 30-300μm), mix according to the mass ratio of 9:1 and add it to water 20 times the fiber mass, add 1% of the fiber mass nitrogen Add boron powder, add silica sol with 1 times the mass of fiber, press filter to form, pressure 3MPa, demold and dry at 50°C, and then sinter at 1100°C;

[0031] The organic airgel is configured as resorcinol + formaldehyde (RF airgel), and the mass is 20% of the mass of the high-temperature heat-resistant insulation tile. The sintered high-temperature-resistant heat-resistant tile is put into vacuum impregnation, and the vacuum degree of impregnation is controlled at -0.1 MPa.

[0032] Obtain a lightweight and highly efficient thermal insulation integrat...

Embodiment 2

[0034] Preparation of high temperature resistant heat insulation tile: use pretreated quartz fiber and alumina fiber (fiber length 30-300μm), mix according to the mass ratio of 5:5 and add it to water 60 times the fiber mass, add 10% fiber mass nitriding Boron powder, add silica sol 4 times the fiber mass, press filter molding, pressure 5MPa, demolding and drying, drying temperature 150°C, and then sintering, sintering temperature 1300°C;

[0035] The organic airgel is configured as melamine + formaldehyde (MF airgel), and the mass is 95% of the mass of the high-temperature-resistant heat-insulating tile. Put the sintered high-temperature-resistant heat-resistant tile into vacuum impregnation, and the vacuum degree of impregnation is controlled at 0.05MPa .

[0036] Obtain a lightweight and efficient anti-heat insulation integrated thermal protection material with a density of 0.8g / cm 3 , the compressive strength is greater than 10MPa, the tensile strength is greater than 2.5...

Embodiment 3

[0038] Preparation of high temperature resistant heat insulation tile: use pretreated mullite fiber and alumina fiber (fiber length 30-300μm), add ingredients according to the ratio of mass ratio 7:3 to water 40 times the fiber mass, add 6% fiber mass Boron carbide powder, adding silica sol 2.5 times the fiber mass, press filter molding, pressure 4MPa, demolding and drying, drying temperature 100°C, and then sintering, sintering temperature 1500°C;

[0039]The organic airgel is configured as melamine + formaldehyde (MF airgel), and the mass is 60% of the mass of the high-temperature heat-resistant insulation tile. Put the sintered high-temperature-resistant heat-resistant tile into vacuum impregnation, and the vacuum degree of impregnation is controlled at 0.01MPa .

[0040] Obtain light and high-efficiency anti-heat insulation integrated thermal protection material with a density of 0.6g / cm 3 , the compressive strength is greater than 3MPa, the tensile strength is greater th...

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Abstract

The invention discloses a lightweight high-efficiency thermal protection material integrating heat prevention and heat insulation and a preparation method. The thermal protection material is preparedby dipping a heat insulation matrix with organic aerogel, and the heat insulation matrix is a high-temperature-resistant fiber heat insulation tile. The high-temperature-resistant fiber heat insulation tile is made of quartz fiber, mullite, alumina fiber or a combination of the quartz fiber, the mullite and the alumina fiber. The organic aerogel comprises resorcinol and formaldehyde, melamine andformaldehyde, phenolic resin and formaldehyde or mixed cresol and formaldehyde. By adding the organic aerogel into the thermal insulation matrix, the mechanical strength of the thermal insulation material is improved at normal temperature, it is guaranteed that material failure caused by brittle fracture of the material in the machining and transporting processes is avoided; the thermal insulationperformance of the material is improved in the low-temperature application environment, and heat is brought away through ablation volatilization in the high-temperature stage; therefore, normal workof the thermal protection material in a service environment is ensured.

Description

technical field [0001] The invention relates to the technical field of high-temperature-resistant and heat-insulating materials, and specifically provides a light-weight, high-efficiency heat-insulating integrated thermal protection material and a preparation method thereof, which are applied to the surface of an aircraft or in an environment with severe aerodynamic heating and high heat flux density in a short period of time. Background technique [0002] When a high-speed aerospace vehicle flies in the atmosphere or re-enters the atmosphere, due to the severe aerodynamic heating environment, it is necessary to use lightweight, dimension-shaped, high-efficiency thermal protection materials to prevent heat transfer to the interior of the aircraft, so as to ensure the safety of the aircraft. In addition to low density and low thermal conductivity, the tensile strength, compressive strength, high-temperature linear shrinkage and reusability of thermal insulation materials are a...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C04B35/80C04B35/14C04B35/622C04B35/63C04B41/85
CPCC04B35/14C04B35/622C04B35/6303C04B41/85C04B41/46C04B2235/5232C04B2235/5224C04B2235/5228C04B2235/77C04B2235/96C04B2235/9607C04B41/4515
Inventor 刘瑞祥王开宇崔唐茵隋学叶周长灵程之强王重海张磊张燕刘红花
Owner SHANDONG RES & DESIGN ACADEMY OF IND CERAMICS
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