Effect of Heat Treatment on the Crystal Structure of the Anodic Cerium Oxide Films

Abstract:

The cerium dioxide films were prepared with cerium foils as raw materials by anodization in Na₂C₂O₄-NH₃∙H₂O-H₂O-(CH₂OH)₂ electrolyte. The anodic cerium oxide films were heat treated in 100~400°C and 0.5~2.5h, respectively. The heat treated anodic cerium oxide films were characterized with X-ray diffraction (XRD). The heat treated anodic cerium oxide film at 100°C is semi crystalline film. The heat treated anodic cerium oxide film at 200°C, 300°C, 350°C, 400°C, respectively for 2h, is the cerium dioxide film respectively, and has a structure of cubic fluorite respectively. The crystal structures of the cerium dioxide films become more complete with the increase of heat treatment temperature in 200 ~ 400 °C. The heat treated anodic cerium oxide film at 400°C for 0.5h, 1h, 1.5h, 2.5h, respectively, is the cerium dioxide film respectively, and has a structure of cubic fluorite respectively. The crystal structures of the cerium dioxide films become more complete with the increase of heat treatment times in 0.5h ~ 2.5h.

• Periodical: Key Engineering Materials (Volume 748)
• Pages: 12-16
• DOI: https://doi.org/10.4028/www.scientific.net/KEM.748.12
• Online since: August 2017
• Authors: Xiao Zhen Liu*, Yu Fan Ni, Xiao Zhou Liu, Le Tian Xia, Jie Chen, Xiao Yu Zheng
• Keywords: Anodization, Cerium Dioxide Film, Heat Treating, XRD

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