In this work,nanometer CeO_2 particles are prepared by a template route.The materials includs ce- rium sulfate and sodium hydroxide,and the surfactant is poly vinyl alcohol(PVA)which disperses and protects the prod- uct.The products are characterized by FT-IR spectrum,XRD and TGA-DTA instruments,SEM,the UV-VIS spectro- photometer 756 MC and ultraviolet emission spectrograph instruments.The experiments show that the particle size is about 15nm,the thermal stability is very good,dispersion is good,fluorite st...