While the ratio of H 2O:TEOS(mol) is 0 28 and oxalic acid:TEOS(mol) is 0 01, the gel time is shortest.

• 而当水与正硅酸乙酯的摩尔比达到 0 2 8左右、草酸与正硅酸乙酯的摩尔比为 0 0 1左右时 ,可以使凝胶时间达到最短。