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Thermal Annealing Effect on Optical Properties of Binary TiO2-SiO2 Sol-Gel Coatings

机译:热退火对二元TiO2-SiO2溶胶-凝胶涂层光学性能的影响

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摘要

TiO2-SiO2 binary coatings were deposited by a sol-gel dip-coating method using tetrabutyl titanate and tetraethyl orthosilicate as precursors. The structure and chemical composition of the coatings annealed at different temperatures were analyzed by Raman spectroscopy and Fourier Transform Infrared (FTIR) spectroscopy. The refractive indices of the coatings were calculated from the measured transmittance and reflectance spectra. An increase in refractive index with the high temperature thermal annealing process was observed. The Raman and FTIR results indicate that the refractive index variation is due to changes in the removal of the organic component, phase separation and the crystal structure of the binary coatings.
机译:通过使用钛酸四丁酯和原硅酸四乙酯的溶胶-凝胶浸涂法沉积TiO2-SiO2二元涂层。通过拉曼光谱和傅立叶变换红外光谱(FTIR)分析了在不同温度下退火的涂层的结构和化学组成。涂层的折射率是由测得的透射光谱和反射光谱计算得出的。观察到随着高温热退火过程的折射率增加。拉曼光谱和FTIR结果表明,折射率变化是由于有机组分的去除,相分离和二元涂层晶体结构的变化所致。

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