Transparent mullite ceramic from single-phase gel by Spark Plasma Sintering |
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| Authors: | Guimin Zhang Yucheng Wang Zhengyi Fu Hao Wang Weiming Wang Jinyong Zhang Soo Wohn Lee Kochi Niihara |
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| Affiliation: | 1. State Key Lab of Advanced Technology for Materials Synthesis and Processing, Wuhan University of Technology, Wuhan 430070, PR China;2. Department of Chemistry, School of Sciences, Wuhan University of Technology, Wuhan 430070, PR China;3. Department of Materials Engineering, SunMoon University, Asar, ChungNan 336-708, Republic of Korea;4. Extreme Energy Density Research Institute, Nagoka University of Technology, 1603-1, Kamitomioka, Nagoba, Niigata 940-2188, Japan;1. Faculty of Learning Teacher and Education Science, Siliwangi University, Jl. Siliwangi 24, Tasikmalaya 46115, Indonesia;2. Research Center for Development of Far Infrared Region, University of Fukui, Bunkyo 3-9-1, Fukui 910-8507, Japan;3. Department of Chemistry, Faculty of Mathematics and Natural Sciences, Haluoleo University, Kampus Bumi Tridharma, Anduonohu, Kendari 93232, Indonesia;4. Department of Physics, Faculty of Mathematics and Natural Sciences, Haluoleo University, Kampus Bumi Tridharma, Anduonohu, Kendari 93232, Indonesia;5. Department of Applied Physics, Faculty of Engineering, University of Fukui, Bunkyo 3-9-1, Fukui 910-8507, Japan;6. Ceramic Research Institute, National Institute of Advanced Industrial Science and Technology (AIST), Nagoya, Japan;7. Lab. Plasma Physics and Engineering, Institute of Electronics of the Bulgarian Academy of Sciences, 72 Tzarigradsko Shose Blvd., Sofia 1784, Bulgaria;1. Shanghai Institute of Ceramics, Chinese Academy of Sciences, Shanghai 200050, PR China;2. University of Chinese Academy of Sciences, Beijing 100049, PR China;3. Tokyo University of Agriculture and Technology, Tokyo 183-8538, Japan;1. Physics Department, Faculty of Girls, Ain Shams University, Cairo, Egypt;2. Material Science Lab. (1), Physics Department, Faculty of Science, Cairo University, Giza, Egypt;3. Physics Department, Germany University (GUC), Cairo, Egypt;4. Department of Physics and Energy Harvest-Storage Research Center (EHSRC), University of Ulsan, Ulsan, 44610, South Korea;5. Basic Science Department, Faculty of Industrial Education & Technology, Helwan University, Sray El-Quba, Cairo, 11281, Egypt;1. Key Laboratory on Deep Geodrilling Technology of the Ministry of Land and Resources, China University of Geosciences, Beijing 100083, China;2. School of Materials Science and Technology, China University of Geosciences, Beijing 100083, China;1. School of Material Science and Engineering, Jiangsu University, Zhenjiang 212013, China;2. Key Laboratory of Transparent and Opto-functional Inorganic Materials, Shanghai Institute of Ceramics, Chinese Academy of Sciences, Shanghai 201899, China;3. University of Chinese Academy of Sciences, Beijing 100049, China;1. Chemistry and chemical engineering institute, Mianyang Normal University, Mianyang 621010, PR China;2. Analysis and testing center, Southwest University of Science and Technology, Mianyang 621010, PR China |
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| Abstract: | Monophasic mullite precursors with composition of 3Al2O3·2SiO2 (3:2) were synthesized and then were sintered by Spark Plasma Sintering (SPS) to form transparent mullite ceramics. The precursor powders were calcined at 1100 °C for 2 h. The sintering was carried out by heating the sample to 1450 °C, holding for 10 min. The sintered body obtained a relative bulk density of above 97.5% and an infrared transmittance of 75–82% in wavelength of 2.5–4.3 μm without any additive. When the precursor powders were calcined at below 1100 °C, it was unfavorable for completely eliminating the residual OH, H2O and organic compound. However, when calcined temperature was too high, it was unfavorable either for full densification due to the absence of viscous flow of amorphous phase. At the same calcined temperature, the transmittance of sintered body was decreased with the increase of the sintering temperature above 1450 °C owing to the elongated grain growth. |
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