| INORGANIC MATERIALS AND CERAMIC MATRIX COMPOSITES |
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| Effect of Temperature on Thermal Insulation Performance of Quartz Fiber Felt |
| GUO Jianye1, ZHAO Yingmin2, WU Chaojun3, LI Wenjing1, YANG Jieying1, ZHANG Lijuan1, SU Lijun1
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1 Research Institute of Aerospace Special Materials and Processing Technology, Beijing 100074, China
2 HIWING Technology Academy of CASIC, Beijing 100074, China
3 The Sixth Representative Office in Beijing of Rocket Force, Beijing 100074, China |
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Abstract Quartz fiber felt has great potential in the field of aerospace thermal protection due to its high temperature resistance, low thermal conductivity, light weight and conformability. However, there is a lack of systematic research on its thermal insulation performance. In view of this, this work evaluated the effect of temperature on the thermal insulation performance of quartz fiber felt by studying the change of its thermal conductivity at high temperature and the change of thermal insulation performance of quartz fiber felt before and after high temperature treatment. The results show that the thermal conductivity of quartz fiber felt increases with the increase of temperature, and the thermal conductivity at 1 000 ℃ is 4.9 times that of room temperature, and it is 0.087 W/(m·K) higher than that of fiber reinforced aerogel composites at the same temperature. By comparing the microstructure, density, porosity, linear shrinkage, thermal conductivity and back temperature of quartz fiber felt before and after heat treatment at different temperatures, the results show that the structure of quartz fiber felt remians unchanged at 1 000 ℃, and the thermal conductivity of fiber felt at room temperature remains unchanged after heat treatment at different temperatures. The thermal conductivity of quartz fiber felt after treated at 1 000 ℃ increases by 13% compared with that before treated. The test results of thermal insulation performance of 20 mm thick fiber felt for 1 000 ℃ 1 000 s quartz lamp show that the back temperature of quartz fiber felt after treated at 1 000 ℃ is 8.4% higher than that before treatment. This work provides an important basis for the use of quartz fiber felt at high temperature and its reuse at high temperature.
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Published: 24 December 2020
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About author:: Jianye Guo received his M.S. degree in April 2016 from the Third Research Institute of China Aerospace Science. He is currently an engineer in Research Institute of Aerospace Special Materials and Technology. His research inte-rests are thermal protection materials.
Yingmin Zhao received his M.S. degree in physical chemistry from Jilin University in July 1993. He is currently a professor in HIWING Technology Aca-demy of CASIC. His research interests are non-metallic functional materials. |
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2020, Vol. 34 
