升温速率对钛渣赤泥粉煤灰微晶玻璃析晶的影响

以钛渣代替二氧化钛为晶核剂制备赤泥粉煤灰微晶玻璃,对其微观形貌进行表征,并考察钛渣添加量对微晶玻璃的析晶动力学参数和微观形貌的影响。结果表明,随着钛渣添加量的增多,析晶活化能呈逐渐减小的趋势,晶化指数呈逐渐增大趋势。当钛渣的添加量为6.6%时,活化能降低为581.45kJ/mol,晶化指数为0.8,出现了分布均匀的晶核,晶粒明显长大,析晶效果较好。

Effect of Heating Rate on Crystallization of Red Mud and Fly Ash Glass Ceramics with Adding Titanium Slag Nucleation Agent

Red mud and fly ash glass ceramics were prepared with titanium slag as nucleation agent, and the microstructure was characterized. The effects of dosage of titanium slag on crystallization kinetics parameters and microstructure were investigated. The results show that crystallization activation energy drops and crystallization index rises with increasing of dosage of titanium slag. When adding amount of titanium slag is 6.6%, activation energy drops to 581.45 kJ/mol and crystallization index is 0.8 with occurrence of uniform distribution of crystal nucleus, obvious grow of grain, and preferable crystallization.