Preparation of TiO_2 Thin Films by Sol-Gel Method and Analysis of its Transmittance Based on Computer Image Processing

摘要

TiO_2 films were prepared by sol-gel method with butyl titanate, anhydrous ethanol, acetyl acetone and hydrochloric acid as raw materials, which were sintered at 380 °C and 530 °C respectively to obtain TiO_2 films. XRD was used for analyzing the crystal structure of TiO_2 film, and ImageJ software was used to detect the light transmittance of TiO_2 film samples. The results show that the film sintered at 530 °C is brookite structure and the film sintered at 380 °C is anatase structure. The increase of sintering temperature is not conducive to the growth of TiO_2 film crystals. TiO_2 films sintered at 380 °C have good light transmittance.