用化学沉积法在以废碎玻璃瓶为原料制备的玻璃微珠表面镀二氧化钛薄膜

Glass beads prepared from broken glass bottles material and coating with TiO_2 thin film using chemical deposition method

采用隔离剂法在煅烧温度为900℃、保温时间为30min条件下对60~80目废碎玻璃粉原料进行煅烧制备微珠样品。制备出的微珠样品经过酸碱处理后,利用化学沉积法在其表面镀二氧化钛膜以增加其表面反射率。镀膜时通过改变TiCl_4浓度、尿素浓度、反应温度等因素,经过偏光显微镜观察、反射率测试、EDS测试确定最佳镀膜条件。最佳镀膜条件为：TiCl_4 0.2mol/L,尿素0.5mol/L,反应温度70℃。镀膜后反射率比镀膜前提高了7%。

The samples of glass beads were received by calcining 60-80 mesh broken glass powder material under 900 ℃ and holding time for 30 min by isolating agent method. Samples of beads were treated with acid and alkali before coating, then coated with TiO2 to increase its reflectivity by chemical deposition method. The best coating conditions were selected by the microscope observation, reflectivity and the EDS test, though changing TiCI4 concentration, urea concentration and reaction temperature. The results showed that the best coating condition was TiCI4 concentration of 0.2 mol/L, urea concentration of 0.5 mol/L and the reaction temperature of 70 ℃. Under that condition, the reflectivity after coating was 7 % higher than before.