(1.佳木斯大學(xué)化學(xué)與藥學(xué)院,佳木斯154002; 2.西南交通大學(xué),成都610031;
3.東北大學(xué)材料與冶金學(xué)院,沈陽110006)
摘 要: 制備了以鈦渣和鐵尾礦為主要原料,以鈦渣兼作晶核劑的微晶玻璃材料,研究了TiO2含量變化對玻璃晶化的影響。采用DTA, SEM, XRD等技術(shù)對該體系的晶化機(jī)理進(jìn)行探討。結(jié)果表明,當(dāng)TiO2含量小于10%時(shí)僅產(chǎn)生表面晶化,而當(dāng)TiO2含量為10%時(shí)可發(fā)生整體晶化,其活化能為190.6 kJ·mol-1,動(dòng)力學(xué)參數(shù)m=3,晶體從晶核界面呈三維生長。TiO2和Fe2O3能共同促進(jìn)晶化,晶體從相界面處生長,析出的主晶相為鈣鐵輝石。
關(guān)鍵字: 鈦渣;二氧化鈦;晶核劑;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
