A facile approach for preparing Al2O3 reticulated porous ceramics with optimized closed-cell struts and excellent mechanical properties |
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| Affiliation: | 1. School of Chemistry and Chemical Engineering, Harbin Institute of Technology, Harbin, 150001, China;2. State Key Laboratory of Advanced Welding and Joining, Harbin Institute of Technology, Harbin, 150001, China;1. Department of Physics, Materials Genome Institute and International Center for Quantum and Molecular Structures, Shanghai University, Shanghai, 200444, China;2. Key Laboratory of Polar Materials and Devices, Ministry of Education, Department of Electrical Engineering, East China Normal University, Shanghai, 200241, China;3. Shanghai Key Laboratory of High Temperature Superconductors, Shanghai University, Shanghai, 200444, China;1. School of Metallurgy, Northeastern University, NO.3-11, Wenhua Road, Heping District, Shenyang, 110819, China;2. State Key Laboratory of Rolling and Automation, Northeastern University, NO.3-11, Wenhua Road, Heping District, Shenyang, 110819, China;3. Institute of Metal Research, Chinese Academy of Sciences, Shenyang, 110016, China;1. Shenzhen Key Laboratory of High Performance Nontraditional Manufacturing, College of Mechatronics and Control Engineering, Shenzhen University, Shenzhen, 518060, China;2. Liaoning Key Laboratory of Complex Workpiece Surface Special Machining, University of Science and Technology Liaoning, Anshan, 114051, China;3. Harbin Institute of Technology, Harbin, 150001, China;1. School of Materials Science and Engineering, University of Science and Technology Beijing, Beijing, 100083, China;2. Collaborative Innovation Center of Steel Technology, University of Science and Technology Beijing, Beijing, 100083, China;3. Vesuvius Advanced Ceramics (China) Co., Ltd, Suzhou, 215000, China;4. School of Metallurgical and Ecological Engineering, University of Science and Technology Beijing, Beijing, 100083, China;1. Department of Materials Science and Engineering, Tokyo Institute of Technology, Tokyo, Japan;2. Center for Crystal Science and Technology, University of Yamanashi, 7-32, Miyamae, Kofu, Yamanashi, 400-8511, Japan;1. South China Advanced Institute for Soft Matter Science and Technology, School of Emergent Soft Matter, South China University of Technology, Guangzhou, 510640, China;2. Guangdong Provincial Key Laboratory of Functional and Intelligent Hybrid Materials and Devices, South China University of Technology, Guangzhou, 510640, China;3. Institute for Advanced Materials, Hubei Normal University, Huangshi, 435002, China;4. China Department of Chemistry, The Hong Kong University of Science and Technology, Clear Water Bay, Hong Kong, 999077, China |
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| Abstract: | Reticulated porous ceramics (RPCs) are of great value in applications such as non-ferrous alloys and flue gas filtration. For the purpose of further enhancing the mechanical properties of RPCs without drastically reducing their apparent porosity, a new route to improve the mechanical properties of the strut by constructing a closed-cell structure was proposed to fabricate Al2O3 reticulated porous ceramics (ARPCs). The effects of cryolite on the generation of closed pores, the microstructure, and the mechanical performance of struts were investigated. It was found that the addition of cryolite promoted the densification of the pore walls within the struts during sintering. Furthermore, ARPCs added with 10 wt% cryolite achieved an apparent porosity of nearly 80%, while exhibiting excellent mechanical strength and thermal-shock resistance, with compressive strength and residual strength ratio significantly increased by 56% and 11%, respectively, compared to the samples without cryolite addition. |
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| Keywords: | Strut Cryolite Closed-cell structure Mechanical strength |
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