Study on Preparation of Mullite Powder Using Fly Ash by Mechanochemical Method
This paper studies the structural changes of the mixture of fly ash and Al2O3 grinded by planetary ball mill.By investigating the structure of the ground product by SEM, XRD and FT-IR, the mechanism of mullite formation is discussed.The crystal structure of the mixture was destroyed by the grinding of planetary ball mill, and with the grinding time increases, the specific surface area of the mixture increases as well.And this leads to the decrease of bond energy, the increase of the internal energy and the decrease of the activation energy.After this process,uniform mixture and direct formation of signal phase mullite can be obtained from the mixture grinded for 30 hours and calcined at 1150℃ for 2 hours and the temperature for mixture ungrinded needs to reach 1450℃.
mechanochemical method fly ash mullite powder
ZHANG Lei CHEN Qun-yu GAO Ding
Chemical Engineering Institute, Xuzhou College of Industrial Technology, Xuzhou 221140;JIANGSU JINME Chemical Engineering Institute, Xuzhou College of Industrial Technology, Xuzhou 221140 China University of Mining and Technology, Xuzhou 221000
国际会议
湖北荆州
英文
326-330
2013-05-18（万方平台首次上网日期，不代表论文的发表时间）