轻质耐高温隔热材料及成型技术

针对型号更高的热环境要求,开展新型轻质耐高温隔热材料研究。采用耐高温酚醛树脂作为基体树脂,添加纤维、功能性填料,通过预混料片材进行低压固化成型,对所制备的隔热材料试片进行密度、热性能以及力学性能等的测试。结果表明:该材料体系密度为0.6~0.9 g/cm^3,初始分解温度大于450℃,拉伸强度大于12MPa,200℃拉伸强度大于10 MPa,热导率低于0.25 W/(m·K),并可根据实际应用需求,实现对材料各方面性能的调控。所制备的隔热材料试片通过某型号风洞考核验证,采用该材料体系制备的大尺寸异形结构舱体通过力热联合试验考核,满足总体设计要求。

Processing and Properties of Light Weight High-temperature Insulation

In view of the higher requirements of thermal environment,a novel light-weight high-temperature insulation material was proposed and fabricated. The system used high temperature resistant phenolic resin as matrix and added fibers and functional fillers as reinforcement. Then by performing low-pressure curing molding through pre-mixed sheet to obtain the final material. The density,thermal properties and mechanical properties of the material were tested. The results indicate that the density of the material is 0. 6 to 0. 9 g/cm^3,the initial decomposition temperature is higher than 450 ℃,the tensile strength under room temperature and 200 ℃ are higher than 12 MPa and 10 MPa respectively,and the thermal conductivity is lower than 0. 25 W/(m·K). All the properties can be designed and regulated according to application environment. The prepared heat insulation material test piece passed the ablation examination of model wind tunnel,the large-sized special-shaped structural cabin prepared by the material system passed the combined force-heat test at the same time,and the results can meet the overall design requirements.