Microstructures and strength of microporous MgO-Mg(Al,Fe)2O4 refractory aggregates |
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| Affiliation: | 1. The State Key Laboratory of Refractories and Metallurgy, Wuhan University of Science and Technology, Wuhan 430081, China;2. Chair of Ceramic Materials Engineering, University of Bayreuth, 95447 Bayreuth, Germany;3. Wuhan Xinxin Semiconductor Manufacturing Co. Ltd., Wuhan 430070, China;1. Department of Materials Science and Engineering, Dalian Maritime University, Dalian 116026, China;2. Technical Institute of Physics and Chemistry, Chinese Academy of Sciences, Beijing 100080, China;1. School of Mechanical, Electronic and Control Engineering, Beijing Jiaotong University, Beijing 100044, China;2. State Key Lab of New Ceramics and Fine Processing, School of Materials Science and Engineering, Tsinghua University, Beijing 100084, China;3. School of Mechanical Engineering, Dongguan University of Technology, Dongguan, Guangdong 523808, China;4. School of Energy, Power and Mechanical Engineering, North China Electric Power University, Beijing 102206, China;1. College of Electronic Information and Engineering, Hangzhou Dianzi University, Hangzhou, China;2. College of Materials Science and Engineering, Liaocheng University, Liaocheng, China;1. Institute of Materials, China Academy of Engineering Physics, Jiangyou City 621908, Sichuan, China;2. School of Materials Science and Engineering, Materials Genome Institute, Shanghai University, Shanghai 200444, China;1. National Engineering Laboratory of Modern Materials Surface Engineering Technology, Institute of New Materials, Guangdong Academy of Sciences, Guangzhou 510651, PR China;2. State Key Laboratory for Strength and Vibration of Mechanical Structures, Xi’an Jiaotong University, Xi’an 710049, PR China;3. Institute of Advanced Structure Technology, Beijing Institute of Technology, Beijing 100081, PR China;1. Institute of Advanced Structure Technology, Beijing Institute of Technology, Beijing 100081, PR China;2. Beijing Institute of Long March Aerospace Vehicles, Beijing 100076, PR China |
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| Abstract: | Microporous MgO-Mg(Al, Fe)2O4 refractory aggregates were prepared using magnesite, Al(OH)3 and Fe2O3 applying an in-situ decomposition synthesis method. At 1400–1600 °C, there was a Mg(Al, Fe)2O4 with Fe3+, which had two structures. One was a ring structure formed from Al(OH)3 pseudomorph particle as a template and a low content of Fe3+. The other was the dot and strip structures precipitated in magnesite pseudomorph particles with a high content of Fe3+. Besides, at 1550–1600 °C, microporous MgO-Mg(Al, Fe)2O4 refractory aggregates had an excellent compressive strength (75.8–81.5 MPa) and apparent porosity (26.8%?28.2%). |
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| Keywords: | Microporous refractory aggregates In-situ decomposition synthesis method Microstructures Strength |
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