均一沉淀法云母片被覆TiO2

利用硫酸氧钛和的均一沉淀反应法，在天然矿物云母上被覆ＴｉＯ２薄膜，讨论了薄膜形成主影响膜层结构的工艺因素，分阶段控制反应温度和时间有利于控制析出粒子形态和膜最，可获得均匀致密切的膜，不同厚度的膜层因光学干涉效应显示出各种色彩。

Preparation of TiO_2-Coated Mica by Homogeneous Precipitation

The natural mica slice was coated with TiO_2 by the homogeneous precipitationmethod in which titanyl sulfate(TiOSO_4) and urea were used as raw material.The forma-tion of the thin film and the technological factors influencing the film structure were studied.The adjustment of the temperature and time of the precipitation reaction in various stagesfavoured the control on the morphology of precipitated particles and the thickness of film lay-er,resulting to even and dense films. Owing to the optical interference effect,films with dif-ferent thickness display various color.