夹层结构气凝胶外防热材料的制备及应用技术研究  

Preparation and Application of the Anti-ablation Aerogel Material withSandwich Structure

作　　者：苏力军[1] 赵佳明 王瑞杰[1] 郭慧[1] 宋寒[1] 李文静[1] 杨洁颖[1] SU Lijun;ZHAO Jiaming;WANG Ruijie;GUO Hui;SONG Han;LI Wenjing;YANG Jieying(Research Institute of Aerospace Special Materials and Processing Technology,Beijing 100074,China)

机构地区：[1]航天特种材料及工艺技术研究所,北京100074

出　　处：《材料导报》2020年第S02期157-159,共3页Materials Reports

摘　　要：为了提升传统气凝胶材料的抗承载能力,本实验开展了夹层结构抗冲刷气凝胶外防热材料的制备及应用技术研究,通过研究面板致密化参数(浸渍方式、陶瓷前驱体浓度、浸渍次数等),突破了面板致密化技术,面板材料力学强度稳固提高;通过开展不同Z向纤维密度预制体的制备,突破了夹层结构Z向连接技术,材料应变协调性能大幅提升,中心点挠曲位移达8.5 mm,展现出优异的承载和隔热性能。In order to improve the mechanical strength of traditional aerogel materials,,preparation and application of the anti-ablation aerogel material with sandwich structure were studied.The densification technolgy of panel and Z pin connection technology of sandwich structure were broken through.Thus,The mechanical strength of the panel material was steadily increased,after the study of densification parameters,such as impregnation method,concentration of ceramic precursor,impregnation times.The strain coordination performance was greatly improved,with deflection of the center point about 8.5 mm,after the preparation of fiber preform with different density fiber in the Z direction.It demonstrated the excellent insulation performance and mechanical bearing capacity.

关 键 词：夹层结构 抗冲刷 气凝胶隔热材料 

分 类 号：V45[一般工业技术—材料科学与工程]