Micro-ablation insulating material and preparation method thereof

A technology of thermal insulation materials and composite materials, applied in the field of ablative composite materials with dimensionality and functional gradient and its preparation, can solve the problems of high thermal conductivity, easy to fall off, peel off, unable to further prevent heat flow transfer, etc.

Inactive Publication Date: 2013-12-18
AEROSPACE INST OF ADVANCED MATERIALS & PROCESSING TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, this type of material has a high thermal conductivity after ablation, and cannot further prevent heat flow transfer, so that the long-term ablation / heat insulation performance of the material cannot be exerted
Moreover, it is difficult to maintain the aerodynamic shape of the ablation / insulation material because glass fiber, carbon fiber, basalt wool, glass microspheres and other reinforcing materials or fillers are prone to fall off and peel off after ablation
[0004] In view of the shortcomings of traditional ablation materials such as difficulty in maintaining aerodynamic shape and long-term ablation and heat insulation, this application provides a micro-ablation heat insulation composite material, which is prepared by ablating resin materials and rigid heat insulation materials , the ablative resin material has the functions of ablation and heat insulation, and the rigid heat insulation material has the functions of shape dimension and heat insulation

Method used

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  • Micro-ablation insulating material and preparation method thereof
  • Micro-ablation insulating material and preparation method thereof
  • Micro-ablation insulating material and preparation method thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0145] Example 1: Preparation of Barium Phenolic Resin Composite Rigid Thermal Insulation Material

[0146] (1) Using 3-5μm quartz fiber, borosilicate binder and titanium dioxide anti-radiation agent, blending according to the mass ratio of 100:3:10 to obtain a rigid fiber matrix with a density of 0.2g / cm 3 .

[0147] (2) Place the rigid fiber matrix prepared in step (1) with a size of 100mm×100mm×20mm in a container, vacuumize to remove the gas in the pores of the material, and then vacuum impregnate and composite 20% silica airgel Precursor aqueous solution, the obtained density is 0.40g / cm 3 rigid insulation material.

[0148] (3) Get 200g barium phenolic resin and join in 800g ethanol, add 10g hexamethylenetetramine, stir and dissolve with mechanical stirrer, be made into 20% barium phenolic resin ethanolic solution;

[0149] (4) Open the vacuum valve of the container, automatically inject the prepared phenolic resin solution into the tooling under the action of the int...

Embodiment 13

[0155] Example 13: boron phenolic resin surface layer composite rigid insulation material

[0156] (1) Using 3-5 μm quartz fiber, alumina fiber, borosilicate binder and potassium titanate whisker anti-radiation agent, blending at a mass ratio of 78:22:3::10 to prepare a rigid fiber matrix, The density is 0.25g / cm 3 .

[0157] (2) Place the rigid fiber matrix with a size of 100mm×100mm×20mm in the container, vacuumize to remove the gas in the pores of the material, and then vacuum impregnate the composite 25% silica airgel precursor body, the obtained density is 0.50g / cm 3 rigid insulation material.

[0158] (3) Get 300g barium phenolic resin and join in 700g ethanol, add the hexamethylenetetramine of 10g, stir and dissolve with mechanical stirrer, be made into 30% barium phenolic resin ethanolic solution;

[0159] (4) Open the vacuum valve of the container, slowly inject the prepared boron phenolic resin solution into the container under the effect of the internal and exte...

Embodiment 19

[0165] Example 19: Boron phenolic resin-PMMA double-surface layer composite rigid heat insulation material

[0166] (1) The size is 150mm×150mm×25mm, the density is 0.3g / cm 3 The quartz substrate is put into a 210mm×210mm×40mm container, vacuumed to remove the gas in the pores of the material, and then vacuum impregnated with 20% silica airgel precursor to obtain a rigid thermal insulation with a density of 0.50g / cm3 Material;

[0167] (2) Get 200g boron phenolic resin and add in 800g ethanol solvent, stir and dissolve with mechanical stirrer, after dissolving completely, add 10g p-toluenesulfonic acid curing agent, be made into 20% boron phenolic ethanol solution, measure 120ml solution;

[0168] (3) Open the vacuum valve of the container, slowly inject the prepared boron phenolic resin solution into the container under the effect of the internal and external pressure difference, and adjust the glue feeding speed by controlling the size of the valve;

[0169] (4) Quickly ta...

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Abstract

The invention discloses a micro-ablation insulating material. The micro-ablation insulating material comprises an ablation resin material and a rigid thermal-insulation material, wherein the rigid thermal-insulation material comprises a ceramic base body and an aerogel material. The invention also provides a preparation method of the micro-ablation insulating material. The method comprises the steps of compounding the aerogel material and the ceramic base body to manufacture the rigid thermal-insulation material, compounding the rigid thermal-insulation material and the ablation resin material, and gelling, drying and curing the ablation resin material. The proportions of the rigid thermal-insulation material and the ablation resin material, and the composition and the structure of the composition of the rigid thermal-insulation material and the ablation resin material in the thickness direction can be adjusted according to different using requirements. The micro-ablation insulating material has high designability, excellent superhigh-temperature heat-insulating property, strong variable-dimension ability and good processing performance, can be manufactured into various profiles and sizes, and has good application prospect in the fields of external protection of reentry type aircrafts and thermal protection of superhigh-temperature engines.

Description

technical field [0001] The invention relates to an ablation composite material and a preparation method thereof, in particular to an ablation composite material with dimensionality and functional gradient and a preparation method thereof. Background technique [0002] When the re-entry spacecraft flies in the atmosphere, the outer surface of the vehicle is subjected to high air flow and the temperature is as high as 2000-10000 °C. The high-efficiency ablation heat absorption / heat insulation integrated system must be used to protect the vehicle from heat. [0003] Traditional ablation materials (including low density and high density) use phenolic resin, epoxy resin, silicone resin, polytetrafluoroethylene, etc. Compounded with agents or reinforcing materials. Under high aerodynamic heat flow, heat is absorbed through surface ablation, so as to maintain the lower surface material below a certain temperature and ensure the structural stability of the lower surface material. ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C04B35/66
Inventor 苏力军刘斌张凡宋寒邹军锋张昊周玉贵郭慧赵英民裴雨辰
Owner AEROSPACE INST OF ADVANCED MATERIALS & PROCESSING TECH
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