硅酸盐学报2017，Vol.45Issue(3)：422-432,11.DOI:10.14062/j.issn.0454-5648.2017.03.15
硅–铝溶胶作为耐火浇注料胶结剂的研究现状与展望
Recent Development and Prospects on Silica–Alumina Colloidal Bonded Refractory Castables
摘要
Abstract
This review briefly introduces the different binding systems for refractory castables, and represents the benefits of replacing calcium aluminate cement by colloidal binders. The setting mechanisms of colloidal bonded castables were reviewed for effective control of the setting process. The gelling of silica colloids is closely related to the formation of siloxane network. The suspension of silica colloids is commonly destabilized by controlling the pH value, addition of setting agents, drying the suspension and freezing the sol. The suspension of alumina colloids is commonly destabilized by controlling the pH value, changing the ionic strength and temperature. The use of dispersions in colloidal bonded castables was introduced, highlighting the difference of dispersing mechanism in colloidal systems. The surface of silica colloids in slightly alkaline castables system has negative charge, thus selecting the dispersant with a higher pKa value for greater adsorption. The advantages of silica/alumina colloids as a refractory binder were described including a faster drying, a higher sinterability, a superior mechanical strength at intermediate temperatures, better thermomechanical properties at high temperatures. In addition, the future studies on the colloidal bonded refractory castables were also outlined.关键词
溶胶结合剂/浇注料/应用/展望Key words
colloidal bonder/refractory castables/application/prospect分类
化学工程引用本文复制引用
王玉龙,李享成,陈平安,朱伯铨..硅–铝溶胶作为耐火浇注料胶结剂的研究现状与展望[J].硅酸盐学报,2017,45(3):422-432,11.基金项目
国家自然科学基金(51374162) （51374162）
湖北省自然科学基金重点项目(2014CFA091)资助. （2014CFA091）
