Effect of La2O3 Addition on Synthesis of Al2O3-SiC Composite Powders from Fly Ash
YIN Yue1, MA Beiyue1, ZHANG Bowen1, LI Shiming1, YU Jingkun1, ZHANG Zhan2, LI Guangqiang2
1 School of Metallurgy, Northeastern University, Shenyang 110819; 2 The State Key Laboratory of Refractories and Metallurgy, Key Laboratory for Ferrous Metallurgy and Resources Utilization of Ministry of Education, Wuhan University of Science and Technology, Wuhan 430081
Abstract: Al2O3-SiC powders were synthesized by carbothermal reduction reaction in an argon atmosphere, with fly ash and activated carbon as raw materials. It provides a feasibility route with low-cost to the synthesis of Al2O3-SiC powders. The influence of La2O3 addition on the synthesis process was studied. The phase composition and microstructure of the powders were characterized by XRD and SEM. Results showed that the Al2O3-SiC powders could be synthesized at 1 550 ℃ for 5 h, when the mass ratio of fly ash to activated carbon was 100∶44 with addition of 6% La2O3 (mass fraction). The powders had good performance, uniform particle distribution, and the average particle size was about 0.5-1 μm. The synthesis temperature of composite powder with La2O3 was 50 ℃ lower than that of the mixture without La2O3.
1 Ma B Y, Li Y, Yan C, et al. Effects of synthesis temperature and raw materials composition on preparation of β-Sialon based compo-sites from fly ash [J]. Trans Nonferr Met Soc China,2012,22(1):129. 2 Ahmaruzzman M. A review on the utilization of fly ash [J]. Prog Energy Combust Sci,2010,36(3):327. 3 Yin Y, Ma B Y, Zhang Z, et al. Research situation of high value utilization of coal ash [J]. Mater Res Appl,2015,9(3):158(in Chinese). 尹月,马北越,张战,等. 粉煤灰高附加值利用的研究现状[J]. 材料研究与应用,2015,9(3):158. 4 Xing J, Li J H, Wei Z L. Effect of Y2O3 on synthesizing mullite from high alumina fly ash [J]. Bull Chin Ceram Soc,2007,26(2):291(in Chinese). 邢净,李金洪,魏尊莉. Y2O3对高铝粉煤灰合成莫来石的影响[J]. 硅酸盐通报,2007,26(2):291. 5 Zhao H, Wang P Y, Yu J L, et al. A mechanistic study on the synthesis of β-Sialon whiskers from coal fly ash [J]. Mater Res Bull,2015,65:47. 6 Gilbert J E, Mosset A. Preparation of β-Sialon from fly ashes [J]. Mater Res Bull,1998,33(1):117. 7 Ma B Y, Li Y, Cui S G, et al. Preparation and sintering properties of zirconia-mullite-corundum composites using fly ash and zircon [J]. Trans Nonferr Met Soc China,2010,20(12):2331. 8 Liu J, Dong Y C, Dong X F, et al. Feasible recycling of industrial waste coal fly ash for preparation of anorthite-cordierite based porous ceramic membrane supports with addition of dolomite [J]. J Eur Ceram Soc,2016,36(4):1059. 9 Zhu Q, Yu J K. Synthesis of SiC-Al2O3 refractory commposite powder [J]. J Chin Ceram Soc,2008,36(1):40. 10 Xu S, Wang X T, Wang Z F, et al. Synthesis of Al2O3-SiC compo-site materials from waste clay brick powder [J]. Rare Met Mat Eng,2007,36(S2):586(in Chinese). 徐圣,王玺堂,王周福,等. 用耐火粘土废砖粉制备Al2O3/SiC复相陶瓷材料的研究[J]. 稀有金属材料与工程,2007,36(S2):586. 11 Wang C S, Zou Z G, Gu T, et al. In-situ synthesis of SiCw/Al2O3 ceramic composite powder from natural kaolinite [J]. J Mater Eng,2006(12):11(in Chinese). 王朝胜,邹正光,顾涛,等. 天然高岭土原位还原制备SiCw/Al2O3复相陶瓷粉末[J].材料工程,2006(12):11. 12 Ma B Y, Zhu Q, Sun Y, et al. Synthesis of Al2O3-SiC composite and its effect on the properties of low-carbon MgO-C refractories [J]. J Mater Sci Technol,2010,26(8):715. 13 Han B Q, Li N. Preparation of β-SiC/Al2O3 composite from kaoli-nite gangue by carbothermal reduction [J]. Ceram Int,2005,31(2):227. 14 陈肇友. 化学热力学与耐火材料[M]. 北京: 冶金工业出版社,2005:494. 15 Li X L, Wang J, Ji H M, et al. Catalytic effect and mechanism of Fe2O3 on synthesis of Si2N2O by carbothermal reduction and nitridation of SiO2[J]. Aerosp Mater Technol,2012(2):95(in Chinese). 李晓雷,王健,季惠明,等. Fe2O3对碳热还原氮化SiO2合成Si2N2O的催化效应及机理[J]. 宇航材料工艺,2012(2):95. 16 Zou Z G, He Z X, Yu S J. Synthesis of Al2O3/SiC composite in carbothermal reaction of nature mineral of kaolinite [J]. Bull Chin Ceram Soc,2004(4):110(in Chinese). 邹正光,何曾先,余石金. 天然高岭土碳热还原制备Al2O3/SiC复相陶瓷粉[J].硅酸盐通报,2004(4):110. 17 Li Y W, Li N, Li W Z, et al. Synthesis of Al2O3/SiC composite in carbothermal reduction of clay mineral [J]. China Ceram,2000,36(3):13(in Chinese). 李亚伟,李楠,李文忠,等. 碳热还原粘土合成Al2O3/SiC复相陶瓷粉末[J]. 中国陶瓷,2000,36(3):13. 18 Cao H S, Chen S O, Shao W Q, et al. Effect of rare earth dopant on phase transformation and sintering behavior of γ-Al2O3 [J]. Bull Chin Ceram Soc,2008,27(5):924(in Chinese). 曹红诗,陈沙鸥,邵渭泉,等. 稀土掺杂对γ-Al2O3相变及烧结行为的影响[J]. 硅酸盐通报,2008,27(5):924. 19 Fu C, Wang J B, Yang M G, et al. Effect of La doping on microstructure of SnO2 nanopowders prepared by co-precipitation method [J]. J Non-Cryst Solids,2011,357(3):1172. 20 Ma B Y, Yu J K. Phase composition of SiC-ZrO2 composite materials synthesized from zircon doped with La2O3[J]. J Rare Earths,2009,27(5):806.
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2017, Vol. 31 
