标题：Effect of BaO content on wollastonite glass-ceramics from coal fly-ash
作者：Yao, Shu-Yu ;Huo, Wen-Long ;Pei, Zhong-Ai ;Han, Ye ;Zhang, Wei-Wei
作者机构：[Yao, Shu-Yu ;Huo, Wen-Long ;Pei, Zhong-Ai ;Han, Ye ;Zhang, Wei-Wei ] School of Materials Science and Engineering, Shandong University of Science and 更多
来源：Cailiao Rechuli Xuebao/Transactions of Materials and Heat Treatment
摘要：CaO-Al2O3-SiO2 glass-ceramics was prepared by sintering method from coal fly-ash. The crystal phase type was examined by X-ray diffraction analysis. The phase composition, glass-ceramics microstructure, oxygen-silicon ratio of glass matrix were investigated by electron probe microanalysis-energy dispersive spectrometer analysis. The results show that oxygen-silicon ratio of matrix increases from 2.80 to 2.91 when the content of BaO increases from 2% to 5.77%. The network connection of the silicon-oxygen tetrahedron, high temperature viscosity and final sintering temperature are reduced with the increasing oxygen-silicon ratio. There is an only wollastonite in the glass-ceramics, and three elements including only Ca, Si and O exist in crystal phase by EDS analysis. The atomic ratio of those elements closes to 1:1:3, for which the chemical formula can be as CaSiO3. Therefore, the changes of BaO content have no effect on the main crystal phase type of the glass-ceramics, in which the wollastonite is the single crystal phase.