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›› 2007, Vol. 7 ›› Issue (2): 327-331.

• 过程与工艺 • 上一篇    下一篇

TiO2加入量对高炉渣微晶玻璃析晶的影响

岳钦艳,张升晓,于慧,高宝玉,王晓娜,解建坤   

  1. 山东大学环境科学与工程学院
  • 出版日期:2007-04-20 发布日期:2007-04-20

Effect of TiO2 Addition on Crystallization of Glass-ceramic Made from Blast Furnace Slag

YUE Qin-yan,ZHANG Sheng-xiao,YU Hui,GAO Bao-yu,WANG Xiao-na,XIE Jian-kun   

  1. Environmental Science and Engineering Institute, Shandong Univ.
  • Online:2007-04-20 Published:2007-04-20

摘要: 以高炉渣微晶玻璃为研究对象,改变配料中晶核剂TiO2的含量,制得微晶玻璃样品. 以不同的升温速率对样品进行差热分析,根据升温速率和差热分析曲线上的晶化峰温度,采用3种不同的方法计算微晶玻璃样品的析晶活化能. 结果表明,随着TiO2含量的增加,析晶活化能呈现出先减小后增大的趋势,在TiO2的加入量为3.1%时,微晶玻璃的析晶活化能最低,此时拟合出的3种析晶活化能最小值分别为135.7, 143.9, 151.7 kJ/mol. 样品的红外谱图表明,TiO2的含量为3%~4%时析出晶体较多. TiO2含量为3%和4%的样品的X射线衍射图谱表明,样品中析出了以透辉石为主晶相、金红石为次晶相的晶体.

关键词: 微晶玻璃, 晶核剂, 析晶活化能, 差热分析, 红外分析, X射线衍射分析

Abstract: Glass-ceramic made from blast furnace slag was studied. Glass-ceramic samples were produced by changing the content of TiO2 as nucleation-agent in the parent glass, and the samples were analyzed by a differential thermal analyzer (DTA) at different heating rates. Based on heating rate and the peak crystallization temperatures from the DTA curves, three different methods were used to calculate crystallization activation energy of glass-ceramic samples. The results showed that as TiO2 content increased, the values of activation energy first decreased, then increased. When the content of TiO2 was 3.1%, the activation energy was the lowest, 135.7, 143.9, or 151.7 kJ/mol, as calculated by the three different methods. Infrared spectra showed that the crystallization was the easiest when the content of TiO2 was between 3% and 4%. X-ray diffraction analysis showed that when the content of TiO2 was between 3% and 4%, the formed glass-ceramic had the crystal phases of diopside as main phase and rutile as subordinate crystal phase.

Key words: glass-ceramic, nucleation-agent, nucleation-agent, crystallization activation energy, differential thermal analyzer, IR, XRD