耐高温二氧化硅气凝胶复合材料制备及其导热研究

材料导报

2021, Vol. 35

Issue (z2): 90-93

无机非金属及其复合材料

耐高温二氧化硅气凝胶复合材料制备及其导热研究

郭建业¹, 赵英民², 李文静¹, 杨洁颖¹, 王瑞杰¹, 苏力军¹

1 航天特种材料及工艺技术研究所,北京 100074
2 中国航天科工飞航技术研究院,北京 100074

Preparation and Thermal Conductivity of High Temperature Silica Aerogel Composites

GUO Jianye¹, ZHAO Yingmin², LI Wenjing¹, YANG Jieying¹, WANG Ruijie¹, SU Lijun¹

1 Research Institute of Aerospace Special Materials and Processing Technology, Beijing 100074, China
2 HIWING Technology Academy of CASIC, Beijing 100074, China

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摘要以二氧化硅溶胶为前驱体,利用树脂转移模塑成型(Resin transfer molding,RTM)工艺制备了二氧化硅气凝胶复合材料。对制备的气凝胶复合材料进行了结构表征;对气凝胶复合材料的隔热性能和耐高温性能进行了试验考核,结果显示,20 mm厚材料经过900 ℃、1 000 s的石英灯考核后背温为186 ℃,材料经过1 100 ℃、1 000 s的马弗炉试验后线收缩率为1.2%,该气凝胶复合材料具有优良的隔热性能和耐高温性能。研究了温度对气凝胶复合材料导热的影响,结果表明,气凝胶复合材料的导热系数随温度的升高逐渐增大,900 ℃导热系数为室温的5倍。研究了气体环境对气凝胶复合材料导热的影响,发现氮气环境下气凝胶复合材料的导热系数随温度的变化与空气环境基本相同。

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	郭建业
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	苏力军

关键词: 耐高温气凝胶复合材料导热

Abstract: Silica sol was used as precursor to prepare silica aerogel composites by using RTM technology. The structure characterization of the aerogel composites was carried out. The thermal insulation and temperature resistance of aerogel composites were tested, the results show that the back temperature of 20 mm thick material is 186 ℃ after 900 ℃ and 1 000 s quartz lamp test, the linear shrinkage of material is 1.2% after 1 000 s muffle furnace test at 1 100 ℃, the aerogel composites have excellent thermal insulation and temperature resistance. The effect of temperature on the thermal conductivity of aerogel composites was studied, the results show that the thermal conductivity of aerogel composites increases with the increase of temperature, the thermal conductivity at 900 ℃ is 5 times of the thermal conductivity at room temperature. The influe-nce of gas environment on the thermal conductivity of aerogel composites was studied, the results show that the thermal conductivity of aerogel composites in nitrogen environment is basically the same as that in air environment.

Key words: high temperature resistance aerogel composites thermal conductivity

发布日期: 2021-12-09

ZTFLH:

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通讯作者: tzcl200216@163.com

作者简介: 郭建业,航天特种材料及工艺技术研究所,工程师。2016年4月毕业于中国航天科工三院,获得硕士学位。同年加入航天特种材料及工艺技术研究所工作至今,主要从事热防护材料的研究工作。
赵英民, 中国航天科工飞航技术研究院,研究员。1993年7月毕业于吉林大学,获物理化学硕士专业学位,主要从事非金属功能材料的研究工作。

引用本文:

郭建业, 赵英民, 李文静, 杨洁颖, 王瑞杰, 苏力军. 耐高温二氧化硅气凝胶复合材料制备及其导热研究[J]. 材料导报, 2021, 35(z2): 90-93.
GUO Jianye, ZHAO Yingmin, LI Wenjing, YANG Jieying, WANG Ruijie, SU Lijun. Preparation and Thermal Conductivity of High Temperature Silica Aerogel Composites. Materials Reports, 2021, 35(z2): 90-93.

链接本文:

http://www.mater-rep.com/CN/ 或 http://www.mater-rep.com/CN/Y2021/V35/Iz2/90

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