Details

Autor(en) / Beteiligte

• Li, Jie
• Sun, Ti-chang
• Wang, Yong
• Wang, Li-na
• Qu, Jing-kui
• Qi, Tao

Titel

Preparation and film-growing mechanism of hydrous zirconia coated on TiO2

Ist Teil von

• International journal of minerals, metallurgy and materials, 2010-10, Vol.17 (5), p.660-667

Ort / Verlag

Beijing: University of Science and Technology Beijing

Erscheinungsjahr

2010

Quelle

Alma/SFX Local Collection

Beschreibungen/Notizen

• To overcome the photochemical activity of rutile used as a pigment and improve its durability in application, hydrous zirconia-coated TiO2 was prepared by the precipitation method. High-resolution transmission electron microscope （HRTEM） and X-ray photoelectron spectroscopy （XPS） were used to characterize the morphology and surface structure of hydrous zirconia-coated TiO2. The ζ-potential and ultraviolet （UV） absorption of both coated and uncoated rutile were examined. The results show that hydrous zirconia can not only improve the durability but also raise the lightness. A suitable ZrO2 content of hydrous zirconia-coated TiO2 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 zirconia-coating process and the film growth mechanism were discussed.