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Preparation of uniform TiO2 nanostructure film on 316L stainless steel by sol-gel dip coating |
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| Authors: | N Barati H Ghasemi Z Sadeghian |
| Institution: | a Department of Materials Science and Engineering, Sharif University of Technology, Azadi Street, P.O. Box 11365-9466, Tehran, Iran b Department of Mechanical Engineering, University of Toronto, 5 King's College Road, Toronto M5S 3G8, Ontario, Canada c Department of Gas, Research Institute of Petroleum Industry (RIPI), P.O. Box: 18745-4163, Tehran, Iran |
| Abstract: | Sol was prepared by the mixing of tetra-η-butyle titanat, ethyl aceto acetate, and ethanol in an optimized condition. Polished 316L specimens were coated with the sol by dip-coating method. The influences of drying condition, withdrawal speed, calcination temperature, addition of dispersant, and pH of sol on TiO2 nanostructure coating were investigated. Choosing of alcohol as drying atmosphere hindered the crack formation. The relation between coating thickness and withdrawal speed was evaluated. The optimum temperature to create a uniform distribution of nanoparticles of anatase was derived as 400 °C. Average roughness of coating was found about 10.61 nm by AFM analysis. Dispersant addition promoted formation of a uniform film as well as prevention of agglomeration. Acidic sol provided smaller particles than neutral sol. |
| Keywords: | Sol-gel Anatase Nanostructure coating Dip-coating |
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