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To overcome the photochemical activity of rutile used as a pigment and improve its durability in application,hydrous zirco-nia-coated TiO2 was prepared by the precipitation method.High-resolution transmission electron microscope(HRTEM)and X-ray photo-electron spectroscopy(XPS)were used to characterize the morphology and surface structure of hydrous zirconia-coated TiO2.The potential and ultraviolet(UV)absorption of both coated and uncoated rutile were examined.The results show that hydrous zirconia can not only im-prove the durability but also raise the lightness.A suitable ZrO2 content of hydrous zirconia-coated Ti02 is about 1.0wt%,and a dense film on the surface of rutile can be formed with better pigmentary properties.Based on the thermodynamic analysis,the zirconiaoating process and the film growth mechanism were discussed.