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Hydrothermal Crystallization and Crystal Growth of Un-doped and ZrO2 -doped CeO2

  • Eiji Tani
  • Masahiro Yoshimura
  • Shigeyuki Sōmiya

Abstract

The crystallization of un-doped and ZrO2-doped CeO2 was studied from the precipitated hydrous ceria with KF, LiCl, LiBr, K2CO3, LiNO3, Li2S04 and NaOH solutions under 100 MPa at 500 to 600°C for 24 h. The KF and Li2SO4 solutions enhanced effectively the growth of the crystallite of un-doped CeO2. The LiCl, LiBr and Li2SO4 solutions, whereas, enhanced the growth of the crystallite of ZrO2-doped CeO2. The calcination of the precipitated hydrous ceria contributed to the hydrothermal growth of the crystallite of ZrO2-doped CeO2 with LiCl solution. The single crystals of un-doped CeO2 (120µm) and ZrO2-doped CeO2 (200µm) were obtained by the hydrothermal treatments with KF and LiCl solutions, respectively.

Keywords

Hydrothermal Treatment Hydrothermal Condition Hydrothermal Growth LiCl Solution Hydrothermal Crystallization 
These keywords were added by machine and not by the authors. This process is experimental and the keywords may be updated as the learning algorithm improves.

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Copyright information

© Elsevier Science Publishers Ltd 1989

Authors and Affiliations

  • Eiji Tani
    • 1
  • Masahiro Yoshimura
  • Shigeyuki Sōmiya
  1. 1.Government Industrial Research Institute of KyūshūTosu, SagaJapan

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