Journal of Inorganic Materials ›› 2012, Vol. 27 ›› Issue (1): 107-112.DOI: 10.3724/SP.J.1077.2011.11411

• Orginal Article • Previous Articles    

Effect of Fluoride Content on Morphology and Phase Composition of ZrO2 Nanotubes

XU Ying1,2, LIU Xuan-Yong1, DING Chuan-Xian3   

  1. (1. State Key Laboratory of High Performance Ceramics and Superfine Microstructure, Shanghai Institute of Ceramics, Chinese Academy of Sciences, Shanghai 200050, China; 2. Graduate University of Chinese Academy of Sciences, Beijing 100039, China;  3. Key Laboratory of Inorganic Coating Materials, Shanghai Institute of Ceramics, Chinese Academy of Sciences, Shanghai 200050, China)
  • Received:2011-07-06 Published:2012-01-09 Online:2011-12-19
  • About author:XU Ying (1985-), female, candidate of PhD. E-mail: xuying20033957@163.com
  • Supported by:
    Foundation item: Shanghai Science and Technology R&D Fund (1052nm06600);National Natural Science Foundation of China (51071168)

Abstract:

The present research demonstrates the significant influence of fluoride content on the morphology, phase structure and chemical composition of ZrO2 nanotube arrays which were prepared via a direct electrochemical anodization of zirconium foil in glycerol-based electrolytes composed of 5vol% H2O and different contents of NH4F from 0.1 mol/L to 1.1 mol/L. The as-prepared nanotube arrays with external diameter of 90-130 nm and length of 4.8- 9.1 μm were characterized by scanning electron microscope (SEM), X-ray diffraction (XRD) and X-ray photoelectron spectrum (XPS). The results show that the highly ordered and vertically aligned tetragonal ZrO2 nanotube arrays can be obtained in the electrolyte containing 0.7 mol/L NH4F, and they become amorphous at lower NH4F concentration and collapse at higher NH4F concentration. Moreover, the F/O atomic ratio near the top surface of nanotubes is also dependent on the F- concentration in the electrolyte.

Key words: ZrO2, nanotube arrays, fluoride, tetragonal phase, anodization

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