(1.佳木斯大学化学与药学院,佳木斯154002; 2.西南交通大学,成都610031;
3.东北大学材料与冶金学院,沈阳110006)
摘 要: 制备了以钛渣和铁尾矿为主要原料,以钛渣兼作晶核剂的微晶玻璃材料,研究了TiO2含量变化对玻璃晶化的影响。采用DTA, SEM, XRD等技术对该体系的晶化机理进行探讨。结果表明,当TiO2含量小于10%时仅产生表面晶化,而当TiO2含量为10%时可发生整体晶化,其活化能为190.6 kJ·mol-1,动力学参数m=3,晶体从晶核界面呈三维生长。TiO2和Fe2O3能共同促进晶化,晶体从相界面处生长,析出的主晶相为钙铁辉石。
关键字: 钛渣;二氧化钛;晶核剂;玻璃晶化
（1. School of Chemistry and Pharmacy, Jiamusi University, Jiamusi 154002, P.R.China;
2. Southwest Jiaotong University, Chengdu 610031, P.R.China;
3. School of Materials and Metallurgy, Northeastern University, Shenyang 110006, P.R.China）
Abstract:The glass ceramics were prepared by using titanium slags and ferrous tailings as the raw materials, in which TiO2 functioned as the nucleation agents. The effect of TiO2 content on the crystallization was studied. The crystallization process was investigated by DTA, XRD and SEM. It was showed that the bulk crystallization process occurs when the content of TiO2 is 10%. The activation energy for crystal growth, Ec=190.6 kJ·mol-1, and the kinetic parameter m=3 were evaluated by DTA and kinetic method. The main crystal phase of glass ceramic is hedenbergite and has good strength property. It was found that TiO2 and Fe2O3 can efficiently induce nucleation and crystallization. When the TiO2 content is fewer than 10%, the surface crystallization occurs.
Key words: slags bearing titanium; titania; nucleation; glass crystallization
