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期刊论文
Properties of sol-gel derived scratch-resistant nano-poroussilica flms by a mixed atmosphere treatment
，-0001，（）：
A strengthening mechanism for sol-gel derived nano-porous silica flms was studied. The silica flms were preparedwith the dip method from two-step catalyzed silica sols and treated in a mixed atmosphere of ammonia and water vaporafterwards. Properties of the flms were analyzed by using atomic force microscopy (AFM), Fourier-transform infraredspectroscopy (FTIR), ellipsometry and an abrasion test, respectively. The experimental results have shown that the twostepcatalysis strengthens the flms and the scratch resistance of the silica flms is further improved after treatment in themixed gas. The increase in strength is attributed to the cross-linking of silica particles by randomly branched or/andentangled linear chains in the sols, more Si-O-Si bonds formed by the mixed gas treatment and structural changes inthe silica flms.
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