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超高温刚性隔热材料的制备及性能
引用本文:孙晶晶,胡子君,陈海坤,王钦,王晓婷.超高温刚性隔热材料的制备及性能[J].宇航材料工艺,2012,42(4):93-96.
作者姓名:孙晶晶  胡子君  陈海坤  王钦  王晓婷
作者单位:航天材料及工艺研究所,先进功能复合材料技术重点实验室,北京 100076
摘    要:针对新型航天飞行器高温隔热(约1 500℃)的迫切需求,开展了超高温刚性隔热材料的制备和性能研究。采用陶瓷纤维和无机粘结剂,经过湿法抽滤成型、高温热处理等工艺制备了刚性隔热材料。对材料的微观结构、热物理和力学性能进行了表征、测试。结果表明:纤维有效粘结在一起;通过改变纤维和粘结剂的比例,可以调节材料性能;热导率、力学性能与密度近似呈直线关系。材料在1 500℃经1 h处理后线收缩率<2%,密度为0.3~0.5 g/cm3,热导率为0.06~0.09 W/(m.K),压缩强度为0.6~1.2 MPa。

关 键 词:陶瓷纤维  超高温  刚性隔热材料

Fabrication and Properties of Ultra-High Temperature Rigid Thermal Insulation Materials
Sun Jingjing , Hu Zijun , Chen Haikun , Wang Qin , Wang Xiaoting.Fabrication and Properties of Ultra-High Temperature Rigid Thermal Insulation Materials[J].Aerospace Materials & Technology,2012,42(4):93-96.
Authors:Sun Jingjing  Hu Zijun  Chen Haikun  Wang Qin  Wang Xiaoting
Institution:Sun Jingjing Hu Zijun Chen Haikun Wang Qin Wang Xiaoting(Science and Technology on Advance Functional Composites Laboratory,Aerospace Research Institute of Materials & Processing Technology,Beijing 100076)
Abstract:To meet the need of thermal protection(~1 500℃) for novel aerospace vehicles,ultra-high temperature rigid thermal insulation materials had been fabricated and investigated.Using a high-resisting fiber and inorganic binder,the insulation was produced through the process of vacuum-molding and firing the dried billet.The microstructure,thermophysical and mechanical properties of the materials were characterized and measured.The results showed that the fibers were bonded effectively;the properties could be tailored by adjusting the ratio of fiber to binder;the thermal conductivity at room temperature and mechanical properties varied linearly with density.The insulation materials had a shrinkage of less than 2% after heating at 1 500℃ for 1 h,a low density in the range of 0.3 to 0.5 g/cm3,thermal conductivity of 0.06 to 0.09 W/(m·K),and compressive strength of 0.6 to 1.2 MPa.
Keywords:Ceramic fiber  Ultra-high temperature  Rigid thermal insulation
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