摘要
研究了ＭｇＳｉＦ_６、Ｈ_３ＰＯ_４及其加入量对铝硅酸溶胶的凝集特性影响，结果表明：在铝硅酸溶胶中加入ＭｇＳｉＦ_６和Ｈ３ＰＯ_４都会使溶胶系统的胶凝时间缩短，而ＭｇＳｉＦ_６和Ｈ３ＰＯ４的加入量对凝胶强度的影响有一最佳范围。ＭｇＳｉＦ_６和Ｈ_３ＰＯ_４的加入量对铝硅酸溶胶的凝集特性影响的本质是由ｐＨ的变化引起的，而ＭｇＳｉＦ_６的加入降低了液相中Ａｌ^（３＋）浓度，消除了Ａｌ（３＋）的絮凝作用，从而使溶胶得以正常胶凝．
The effects of MgSiF_6 and H3PO_4 as well as their amount on the aggregation features of aluminosilica sol are studied.The results show that adding MgSiF_6 and H3PO4 into aluminosilica sol would result in decrease of gelatination time,while for the gel strength there is an optimum addition of MgSiF_6 and H_3PO_4 The effects of MgSiF_6 and H_3PO_4 addition on the gelatination time and the gel strength of aluminosilica sol essentially result from the change of pH.However,the addition of MgSiF_6 could reduce the concentration of Al￣(3+)ions in the solution so asto eliminate the flocculation effect of Al￣(3+) and enable the sol to get normal gelatination.
出处
《南京化工大学学报》
1996年第2期17-22,共6页
Journal of Nanjing University of Chemical Technology(Natural Science Edition)
基金
国家自然科学基金
关键词
铝硅酸
溶胶
注入固化材
胶凝时间
固化
aluminosilica sol MgSiF_6 H_3PO_4 grout gelatination time gel strength
