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Wetting variation of the zirconia ceramic film by laser

In this paper, yttria-stabilized zirconia ceramic films of fine particles in order of nanometer have been prepared by sol-gel process and the wetting ability of the ceramic thin film before and after laser ablation is discussed. The results showed that the wetting ability depended on the abundance ratio of O to Zr on the membrane surface. The smaller the ratio is, the better the wetting ability is. The oxygen deficiency occurs after laser treatment which makes the value O/Zr small. At this time, water can spread on the membrane surface. So, the membrane exhibits hydrophilicity after laser ablation. After a month aging, the oxygen in the air is absorbed onto membrane surface which makes the value O/Zr large and the water can not spread on the membrane surface.