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High silica/phenolic aldehyde material with excellent ablation resistance and heat insulation performance and preparing method thereof

An ablation-resistant, high-silicon-oxygen technology, applied in the field of composite materials, to achieve the effects of improved mechanical properties, small thickness and low density

Inactive Publication Date: 2019-11-05
LANZHOU INST OF CHEM PHYSICS CHINESE ACAD OF SCI
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

So far, although there are many reports on the modification of the ablation resistance of phenolic resin, and the modification of its composite materials with various nanoparticles and thermal insulation fillers, the above two problems have not been completely solved.

Method used

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  • High silica/phenolic aldehyde material with excellent ablation resistance and heat insulation performance and preparing method thereof
  • High silica/phenolic aldehyde material with excellent ablation resistance and heat insulation performance and preparing method thereof
  • High silica/phenolic aldehyde material with excellent ablation resistance and heat insulation performance and preparing method thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0013] Raw material components (by mass percentage): boron phenolic resin 38%, high silica fiber 50%, alumina airgel powder 2%, potassium hexatitanate whisker 6%, SiC micropowder 4%;

[0014] Preparation process: Dissolve boron phenolic resin in absolute ethanol at a volume ratio of 1:10, stir and disperse evenly; then add high silica fiber, alumina airgel powder, potassium hexatitanate whisker and SiC micropowder in sequence and stir Disperse evenly; then dry at 60°C for 24 hours, remove the solvent ethanol to obtain a fiber prepreg; finally put the fiber prepreg into a mold, heat press at 200°C and 30MPa, cool, and demould, that is, a good High silica / phenolic composite material with ablation resistance and thermal insulation properties. Its physical and chemical properties are listed in Table 1.

Embodiment 2

[0016] Raw material components (by mass percentage): boron phenolic resin 33%, high silica fiber 56%, silica airgel powder 1%, potassium hexatitanate whisker 8%, SiC micropowder 2%;

[0017] Preparation process: Dissolve boron phenolic resin in absolute ethanol at a volume ratio of 1:15, stir and disperse evenly; then add high silica fiber, alumina airgel powder, potassium hexatitanate whisker and SiC micropowder in sequence and stir Disperse evenly; then dry at 80°C for 24 hours, remove the solvent ethanol to obtain a fiber prepreg; finally put the fiber prepreg into a mold, heat press it at 180°C and 20MPa, cool, and demould, that is, a good High silica / phenolic composite material with ablation resistance and thermal insulation properties. Its physical and chemical properties are listed in Table 1.

Embodiment 3

[0019] Raw material components (by mass percentage): boron phenolic resin 42%, high silica fiber 45%, alumina airgel powder 5%, potassium hexatitanate whisker 3%, SiC micropowder 5%;

[0020] Preparation process: Dissolve boron phenolic resin in absolute ethanol at a volume ratio of 1:12, stir and disperse evenly; then add high silica fiber, alumina airgel powder, potassium hexatitanate whisker and SiC micropowder in sequence and stir Disperse evenly; then dry at 100°C for 24 hours, remove the solvent ethanol to obtain a fiber prepreg; finally put the fiber prepreg into a mold, heat press it at 185°C, 10MPa, cool, and demould, that is, a good High silica / phenolic composite material with ablation resistance and thermal insulation properties. Its physical and chemical properties are listed in Table 1.

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Abstract

The invention discloses a high silica / phenolic aldehyde material with excellent ablation resistance and heat insulation performance. Boron phenolic resin is dissolved in absolute ethyl alcohol with the volume ratio of 1:1-1:20, and then stirred and dispersed uniformly; then, high silica fibers, aerogel powder, potassium hexatitanate crystal whiskers and SiC micropowder are added in sequence and stirred and dispersed uniformly; then drying is conducted for 12-72 hours at the temperature from the room temperature to 120 DEG C, and then the solvent ethyl alcohol is removed to obtain a fiber prepreg; finally, the fiber prepreg is loaded into a mold, and hot press molding, cooling and demolding are conducted to obtain the high silica / phenolic aldehyde material with excellent ablation resistanceand heat insulation performance. The high silica / phenolic aldehyde material has high heat stability, a low heat conductivity coefficient, low density and good ablation resistance; when the high silica / phenolic aldehyde material is used for a jet pipe of an engine of a rocket, the harsh requirements of the engine for the heat insulation performance and ablation resistance can be met with a smallerthickness, and the high silica / phenolic aldehyde material has an important significance in performance improvement and weight reduction of the engine.

Description

technical field [0001] The invention relates to a high-silicon / phenolic material with excellent ablation resistance and heat insulation performance and a preparation method thereof, which is mainly used as an integrated nozzle material of ablation resistance / heat insulation functions of a rocket engine and belongs to the field of composite materials. Background technique [0002] High silica / phenolic composite materials have excellent mechanical properties, ablation resistance, and low cost factors, and are widely used in solid rocket motor nozzles, and are a good ablation-resistant material. However, with the development of aerospace science and technology, rockets fly at higher speeds, and higher requirements are placed on thermal protection materials for rocket engine nozzles, which not only require materials to have good ablation resistance, but also have good heat insulation properties. The ablation performance of high silica / phenolic materials prepared by conventional ...

Claims

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Application Information

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IPC IPC(8): C04B38/08C04B26/12
CPCC04B26/122C04B2201/20C04B2201/32C04B2201/50C04B2111/20C04B2111/40
Inventor 杨景锋毛绍兰罗国礼钱晓强王齐华王廷梅
Owner LANZHOU INST OF CHEM PHYSICS CHINESE ACAD OF SCI
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