标题：Crystallization kinetics and electron probe microanalysis of CaO-Al2O3-SiO2glass-ceramics from coal fly-ash
作者：Yao, Shuyu ;Yao, Yusui ;Han, Ye ;Zhang, Weiwei
作者机构：[Yao, Shuyu ;Yao, Yusui ;Han, Ye ;Zhang, Weiwei ] School of Materials Science and Engineering, Shandong University of Science and Technology, Qingdao 更多
来源：Kuei Suan Jen Hsueh Pao/Journal of the Chinese Ceramic Society
摘要：A glass-ceramic of CaO-Al2O3-SiO2was prepared from coal fly-ash by a sintering method. The crystallization peak temperature Tpwas calculated by differential thermal analysis, the crystallization kinetic was investigated, and the thermal stability of glass was estimated by the crystallization kinetic. The crystalline phase and matrix of the glass-ceramic were characterized by X-ray diffraction and electron probe microanalysis-energy spectrum analysis, respectively. The results show that the activation energy Eais 591.5 kJ/mol, and the index A is 1.87×1013min-1. According to the k(Tp), the stability of the glass decreased with increasing the heating rate, and the heating rate had little effect on the major crystalline phases. The β-wollastonite was the single crystalline phase with the grain sizes of 2-20 μm. The atoms in the glass matrix, which involved the network former, the modified cation and the intermediate former as well, were rather complicated. The property of the matrix was similar to that of the glass of Na2O·SiO2.