Analysis of phase transformation processing and microstructure of Sn doped TiO2

作者：Ta Na; Shi Zhi Ming^*; Wang Xiao Huan; Li Peng Fei; Hou Xiao Hu

来源：Journal of Synthetic Crystals, 2014, 43(1): 163-167.

• Anatase-to-rutile transformations
• Doped titania
• Lattice distortions
• Lattice expansion
• Microstructure analysis
• Sintering temperatures
• TiO
• X ray diffractometers

Sn doped TiO2 has been synthesized by sol-gel method and the crystallization procedure was characterized by high-resolution transmission electron microscopy (HRTEM) and X-ray diffractometer (XRD). The XRD and HRTEM results show that for the pure titania, the rutile occurred when the sintering temperature is above 500°C; but for the 25mol% Sn2+ doped titania, both the anatase and rutile were started to crystallize at 300°C after sintered for 2 h. The results indicated that Sn2+ doping inhibited the growth of the titania crystals; Sn2+ doping significantly promoted the anatase to rutile transformation. The Sn2+ was oxidized to Sn4+ and came into the TiO2 lattice to substitute the Ti4+ and induce lattice expansion and increase of lattice distortion.

• 出版日期2014
• 单位内蒙古大学