文献类型：期刊文献

英文题名：A Superior Artificially Defective Hypocrystalline-Like Structured Silica to Polymers, Metals, and Ceramics for Resisting Ultra-High Energy Laser

作者：Ma, Huihuang[1]; Fan, Chuanjie[1]; Wang, Yi[1]; Liu, Haiyan[1]; Gao, Jianfei[3]; Zhou, Xiaodong[1,2]

机构：[1] Key Laboratory of Specially Functional Polymeric Materials and Related Technology [Ministry of Education], School of Chemical Engineering, East China University of Science and Technology, Shanghai, 200237, China; [2] Shanghai Engineering Research Center of Hierarchical Nanomaterials, East China University of Science and Technology, Shanghai, 200237, China; [3] School of Chemisty and Chemical Engineering, Henan University of Technology, Henan, Zhengzhou, 450001, China

年份：2023

外文期刊名：SSRN

收录：EI(收录号：20230095139)

语种：英文

外文关键词：Aerogels - Continuous wave lasers - Defects - High energy lasers - High power lasers - Irradiation - Laser beams - Silica gel - Thermal conductivity

摘要：Ultra-high energy lasers are extremely destructive to objects. None of the currently available materials, which include ablation-resistant resins, highly reflective metals, and ultra-high temperature-resistant ceramics, can maintain structural integrity under ultra-high energy laser beams. Herein, we report hypocrystalline-like silica composites that achieve laser resistance in reality. This material can limit the continuous rise of the system temperature under a continuous wave (CW) laser and reach a steady state eventually. In other words, it breaks through the limits of laser energy and irradiation time. To the best of our knowledge, this is the first time such a material has been reported with this kind of ultra-high energy laser resistance effect. In the comparative experiment, our material can bear the irradiation of CW laser at the power of 12000 W·cm-2 for 2 min without any destruction. In addition, the material also exhibits a near-zero thermal expansion coefficient (1.3×10-6 °C-1) and extremely low thermal conductivity (91.3 mW·m-1·K-1) at ultra-high temperature because of its hypocrystalline-like structure. It exhibits high thermal stability with ultralow strength degradation (less than 1%) after laser irradiation. Owing to its excellent and stable mechanical properties, the material has wide applications, even in extreme conditions. ? 2023, The Authors. All rights reserved.