Polar bear hair inspired ternary composite ceramic aerogel with excellent interfacial bonding and efficient infrared transmittance for thermal insulation |
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| Affiliation: | 1. School of Materials Science and Engineering, Tianjin Chengjian University, Tianjin 300384, China;2. College of Aeronautical Engineering, Civil Aviation University of China, Tianjin 300300, China;1. State Key Laboratory for Mechanical Behavior of Materials, Xi’an Jiaotong University, Xi’an 710049, China;2. State Key Laboratory for Strength and Vibration of Mechanical Structures, School of Aerospace Engineering, Xi’an Jiaotong University, Xi’an 710049, China;1. Institute of Science and Technology for Ceramics (ISTEC) of the National Research Council (CNR), Via Granarolo 64, I-48018 Faenza, RA, Italy;2. Department of Chemical Sciences, Università degli Studi di Padova, Via Marzolo 1, 35131 Padova, Italy;3. Department of Materials Science and Engineering, Universitat Politècnica de Catalunya, Campus Diagonal Besòs-EEBE, Barcelona 08019, Spain;4. Barcelona Research Center in Multiscale Science and Engineering, Universitat Politècnica de Catalunya, Campus Diagonal Besòs ? EEBE, Barcelona 08019, Spain;1. Shaanxi Province Key Laboratory for Electrical Materials and Infiltration Technology, School of Materials Science and Engineering, Xi’an University of Technology, Xi’an 710048, China;2. Laboratory of Thin Film Techniques and Optical Test, School of Photoelectrical Engineering, Xi’an Technological University, Xi’an 710032, China;1. Institut de Recherche sur les Céramiques (IRCER), UMR CNRS 7315, Université de Limoges, Centre Européen de la Céramique, 87068 Limoges, France;2. Conditions Extrêmes et Matériaux: Haute Température et Irradiation (CEMHTI), UPR CNRS 3079, CNRS UPR 3079, 45071 Orléans, France;3. Xlim, UMR CNRS 7252, Université de Limoges, 87060 Limoges, France;4. Rennes Institute of Chemical Sciences (ISCR), UMR CNRS 6226, University of Rennes, 35042 Rennes, France;1. Institute of Chemistry, Chinese Academy of Sciences, Beijing 100190, PR China;2. University of Chinese Academy of Sciences, Beijing 100049, PR China;1. Université Mohammed V de Rabat, EMI, Avenue Ibn Sina, 10000 Rabat, Morocco;2. Université de Lyon, INSA de Lyon, Université Claude Bernard Lyon 1, CNRS, MATEIS, UMR5510, Villeurbanne, France |
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| Abstract: | Highly porous, heat resisting ceramic aerogels are considered as promising materials for high-temperature insulation. However, the general structural characteristics of ceramic aerogel, such as poor mechanical strength and transparency to infrared radiation, pose a major obstacle to their practical application. In this paper, we report a general strategy to prepare hollow mullite fiber (HMF) structures by coaxial electrostatic spinning and grow TiO2 nanorods (TiO2/NAs) in situ on HMF. The ternary composite ceramic aerogel material was prepared by filling the pores of HMF-TiO2/NAs with SiCN aerogel. The TiO2/NAs increased the fiber/aerogel interfacial bonding of the composite (0.392 MPa, 30% strain) and improved the IR transmittance (～0%, 1200 ℃) without sacrificing their low density and thermal conductivity. In addition, low thermal conductivity (0.041 W/(m·K), 1200 °C) and excellent high-temperature insulation properties allow the composite aerogel to meet the urgent need for lightweight, high-strength, high-temperature insulation systems for spacecraft. |
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| Keywords: | Ultra-high temperature ceramics Fiber-reinforced ceramic aerogel Interfaces Hollow structure Nanorods |
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