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Titanium dioxide (TiO_2) thin films were prepared on microscopes slides by sol-gel and dip-coating processes from specially formulated sols.The results show that there exists anatase and rutile structure of TiO_2 when heat treatment temperature is 450℃,and at 800℃,TiO_2 particle size is of below 100 nm and rutile structure is presented.In the range of 360 nm～400 nm the transmittance of TiO_2 sol increases with the increasing of the concentration of Ti(OC_4H_9)_4 in ethanol solution. The transmittance of TiO_2 films with various number of the layer is measured to be 0% below 320 nm,and the three-layer TiO_2 film is of the best UV resistance in the range of 320 nm～400 nm.
Titanium dioxide (TiO_2) thin films were prepared on microscopically slides by sol-gel and dip-coating processes from specially-formulated sols. The results show that there exists anatase and rutile structure of TiO_2 when heat treatment temperature is 450 ℃, and at 800 ℃ , TiO 2 particle size is below 100 nm and rutile structure is presented. In the range of 360 nm ~ 400 nm the transmittance of TiO 2 sol increases with the increasing of the concentration of Ti (OC_4H_9) _4 in ethanol solution. The transmittance of TiO_2 films with various numbers of the layer is measured to be 0% below 320 nm, and the three-layer TiO 2 film is the best UV resistance in the range of 320 nm ~ 400 nm.