| THE 20TH NATIONAL HIGH-TECH CERAMICS ANNUAL CONFERENCE |
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| Preparation of CaAl12O19/(MgAl2O4-Al2O3) Ceramics by Liquid Infiltration |
| YI Shuai1,2, ZENG Luju1, DENG Lina1, XUE Fei1, XIE Jinli1, LIU Yangai2, FANG Minghao2, WU Xiaowen2, HUANG Zhaohui2
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1 China Building Material Test & Certification Group Co., Ltd, China Building Materials Academy Co., Ltd, Beijing 100024
2 School of Materials Science and Technology, China University of Geosciences (Beijing), Beijing 100083 |
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Abstract CaAl12O19/(MgAl2O4-Al2O3) composite ceramics were prepared by liquid infiltration. The effects of different molar ratios (n(α-Al2O3):n(MgO)=1:1, 2:1, 3:1, 4:1) of raw materials on the phase composition, microstructure and properties of composite ceramics were studied. The results showed that MgAl2O4 phases were confirmed as magnesia-rich or alumina-rich nonstoichiometric spinel. When the content of Al2O3 was insufficient, the Ca12Al14O33 and CaAl4O7 phase were generated. Compared with the uninfiltrated samples, the low melting point Ca12-Al14O33 might promote the growth of MgAl2O4 grains. Although the formation of CaAl12O19 with plate-like morphology reduced the bulk density of samples, the strength increased instead, playing a role of strengthening and toughening. As the content of Al2O3 increased, the bulk density and flexural strength of the samples increased gradually.
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Published: 31 July 2019
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| Fund:This work was financially supported by the National Natural Science Foundation of China (51072186,51032007), the Youth Science Foundation of China Building Materials Academy Co., Ltd (YD-668). |
About author:: Shuai Yi, received his Ph.D. degree from China University of Geosciences (Beijing) in June 2015. He is currently a senior engineer in China Building Materials Academy Co., Ltd. His research interests are advanced refractories, high-performance ceramic materials and other related fields.
Zhaohui Huang, received his Ph.D. degree from University of Science and Technology Beijing in April 2002, and then went to the Department of Materials Science and Technology of Tsinghua University for the postdoctoral research until May 2004. Now, Prof. Huang is currently the Vice Chairman of the China University of Geosciences (Beijing) Labour Union, the Deputy Dean of the School of Materials Science and Technology, the council member of Special Ceramics Branch of the Chinese Ceramic Society, the vice chairman of the Refractory Branch of the Chinese Ceramic Society, and the special advisor National Materials Science and Technology Terminology Commission. His main research fields are advanced ceramics and refractory materials, nanomaterials, rock mineral materials and composite materials. He was the project leader of one key project of National Natural Science Foundation of China, four National Natural Science Foundation Items, and the convener of "Twelfth Five-Year" Technology Support Project. |
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2019, Vol. 33 
