通过 sol- gel法在普通钠钙玻璃表面制备了均匀透明的锐钛矿型 Ti O2 纳米薄膜。用透射电镜 (TEM)、X射线衍射 (XRD)和紫外可见吸收光谱 (UV- VIS)等对薄膜的晶粒大小和透光率进行了表征。结果表明 :随着镀膜次数和热处理时间的增加 ,薄膜中的平均晶粒大小接近线性增加。仅增加 Ti O2 薄膜的热处理时间 ,薄膜中晶粒长大不明显 ,其吸收阀值未发生明显的红移。因此 ,薄膜中晶粒长大的机理可能是 :上一次镀的 Ti O2 晶粒成了下一次镀 Ti O2溶胶的晶核 ,并在此基础上逐渐长大 A uniform and transparent anatase Ti O2 nanofilm was prepared on the surface of ordinary soda-lime glass by sol-gel method. The grain size and transmittance of the films were characterized by TEM, XRD and UV-VIS. The results show that with the increase of coating times and heat treatment time, the average grain size in the films increases nearly linearly. Only Ti02 thin film heat treatment time, the film grain growth is not obvious, the absorption threshold does not occur significant redshift. Therefore, the mechanism of grain growth in the thin film may be: the last plated Ti02 grains become the nucleus of Ti02 sol plated next, and then grow up gradually