High-strength thermal insulating porous mullite fiber-based ceramics |
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| Affiliation: | 1. School of Materials Science and Engineering, Key Lab of Advanced Ceramics and Machining Technology of Ministry of Education, Tianjin University, Tianjin 300072, China;2. Aerospace Business Department, China Academy of Launch Vehicle Technology, Beijing 100076, China;1. College of Materials Science and Technology, Nanjing University of Aeronautics and Astronautics, Nanjing 211100, China;2. Key Laboratory of Materials Preparation and Protection for Harsh Environment (Nanjing University of Aeronautics and Astronautics), Ministry of Industry and Information Technology, Nanjing 211106, China;3. School of Materials Science and Engineering, Nanjing Institute of Technology, Nanjing 211167, China;1. School of Civil Engineering and Architecture, Xi''an University of Technology, Xi''an, 710048, China;2. School of Materials Science and Engineering, Xi''an University of Technology, Xi''an, 710048, China;3. Shaanxi Province Key Laboratory of Corrosion and Protection, Xi''an University of Technology, Xi''an, 710048, PR China;1. School of Materials Science and Engineering, Xi''an University of Technology, Xi''an 710048, China;2. Shi-Changxu Innovation Center for Advanced Materials, Institute of Metal Research, Chinese Academy of Sciences, Shenyang 110016, China;3. School of Materials Science and Engineering, University of Science and Technology of China, Hefei 230026, China;4. School of Transportation Science and Engineering, Harbin Institute of Technology, Harbin 150090, China;5. Department of Materials Science and Engineering, University of California Berkeley, CA 94720, USA;6. Shenyang National Laboratory for Materials Science, Institute of Metal Research, Chinese Academy of Sciences, Shenyang 110016, China;1. School of Materials Science and Engineering, Key Lab of Advanced Ceramics and Machining Technology of Ministry of Education, Tianjin University, Tianjin 300072, China;2. College of Aeronautical Engineering, Civil Aviation University of China, Tianjin 300300, China;3. Department of Materials Science and Technology, Faculty of Engineering, National University of Singapore, Singapore City 119077, Singapore |
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| Abstract: | How to improve the strength of fibrous porous ceramics dramatically under the premise of no sacrificing its low density and thermal conductivity has remained a challenge in the high-temperature thermal insulation field. In this paper, a new kind of high-strength mullite fiber-based ceramics composed of interlocked porous mullite fibers was prepared by nanoemulsion electrospinning and dry pressing method. Results show that as to the porous ceramics with the same density (～ 0.8 g/cm3), the three-dimensional skeleton structure composed of porous mullite fibers was much denser than that composed of solid mullite fibers. Therefore, porous mullite fiber-based ceramics exhibited a higher compressive strength (5.53 MPa) than that of solid mullite fiber-based ceramics (3.21 MPa). In addition, porous mullite fiber-based ceramics exhibited a superior high-temperature heat insulation property because the porous structure in fibers could reduce the radiant heat conduction. This work provides new insight into the development of high-temperature thermal insulators. |
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| Keywords: | Porous fiber Mullite Porous ceramics Thermal insulation materials |
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