有关硅酸溶胶的制备和加热硅酸溶胶使之凝聚的实验中，常出现制成的硅酸溶胶微粒在电解质的作用下看不出有不流动的冻状物凝胶生成的现象。根据北师大，华中师院，南京师院合编的高等师范无机化学教材别年版本（上册第72页）所述：“因为水解，复分解反应等凡能生成不清物者， In experiments involving the preparation of silicic acid sols and heating of silicic acid sols, it has often been observed that silicic acid sol particles produced do not show the phenomenon of gel formation due to the presence of a non-flowing frozen gel under the action of electrolytes. According to the textbook for the teaching of inorganic chemistry of teachers’ colleges edited by Beijing Normal University, Central China Normal University, and Nanjing Normal University, (in the first volume of page 72): "Because of hydrolysis, metathesis, etc.