论文部分内容阅读
以硝酸铈和尿素为原料,采用水热合成法在玻璃基底上制备了具有高反射率和良好抗紫外性能的Ce O2薄膜,并采用SEM、XRD、FT-IR、椭圆偏振仪和UV-vis对薄膜和同时制备的粉体进行了表征,研究了Ce(Ⅲ)浓度和尿素加入量对薄膜的影响。结果表明,当Ce(Ⅲ)浓度和尿素加入量较小时,薄膜光滑且沉积颗粒较小,沉积颗粒是Ce O2和Ce(CO3)2O·H2O晶体,且玻璃基底中的Si参与了水热反应。薄膜致密度和化学组成影响其反射率,随着Ce(Ⅲ)浓度和尿素加入量增加,由于薄膜厚度和半导体复合的影响,其吸光度和吸收边波长增大,最佳的Ce(Ⅲ)浓度是0.008 mol/L,尿素加入量是0.06 g。
CeO2 thin films with high reflectivity and good UV-resistance were prepared on glass substrates by hydrothermal method using cerous nitrate and urea as raw materials. The films were characterized by SEM, XRD, FT-IR, ellipsometer and UV-vis The films and the powders prepared at the same time were characterized. The effects of Ce (Ⅲ) concentration and urea loading on the films were investigated. The results show that when the concentration of Ce (Ⅲ) and the amount of urea are small, the film is smooth and the deposited particles are small, the deposited particles are Ce O2 and Ce (CO3) 2O · H2O crystals, and the Si in the glass substrate is involved in the hydrothermal reaction . As the Ce (Ⅲ) concentration and the amount of urea increase, the absorbance and the absorption edge wavelength increase due to the influence of the film thickness and the semiconductor recombination. The optimal Ce (Ⅲ) concentration Is 0.008 mol / L, the amount of urea added is 0.06 g.