化工学报Issue(3)：1104-1110,7.DOI:10.3969/j.issn.0438-1157.2014.03.047
镁铝离子共存硅酸体系的聚合行为
Polymerization behavior of silicic acid with coexisting magnesium and aluminum ions
摘要
Abstract
Gel time, polymerization rate of monosilicic acid, and thermal performance of gel of silicic acid system with coexisting Mg2+and Al3+ions were investigated. At pH<4, gel time of silicic acid system decreased with the increase of coexisting concentration of Mg2+ and Al3+ ions, and Al3+ ions played an important role in the coagulation process. Polymerization reaction rate constant of monosilicic acid, for silicic acid system with coexisting Mg2+and Al3+ions, was higher than that for silicic acid without metallic ions, and average rate constant for MA0.1+0.1 system was k0=7.28×10-4, k1=5.62×10-4. Crystallization temperature and crystal transformation temperature of silicic acid system with coexisting Mg2+and Al3+ions were lower than those of silicic acid without metallic ions, and chemical formula of hydrated silicon dioxide for MA0.1+0.1 system calculated by TG curve was SiO2·0.556 H2O.关键词
硅酸体系/镁铝离子/胶凝时间/聚合/凝胶/二氧化硅Key words
silicic acid system/magnesium and aluminum ions/gel time/polymerization/gels/silica分类
化学化工引用本文复制引用
申星梅,李辽沙,武杏荣,王平,罗涛..镁铝离子共存硅酸体系的聚合行为[J].化工学报,2014,(3):1104-1110,7.基金项目
安徽省高等学校省级自然科学研究项目（KJ2012A041）；安徽省自然科学基金项目（1208085QB30）。@@@@supported by the University Science Research Project of Anhui Province (KJ2012A041) and the Natural Science Foundation of Auhui Province(1208085QB30) （KJ2012A041）
