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ELECTRON-MICROSCOPY STUDIES ON ULTRAFINE ZIRCONIA POWDERS FROM SOLVENT-EXTRACTION WITH TRIBUTYL-PHOSPHATE IN KEROSENE / J. Mater. Sci. Technol.

Authors
  • YANG, CF
  • CHEN, JY
Publication Date
Jan 01, 1995
Source
Institutional Repository of Institute of Process Engineering, CAS (IPE-IR)
Keywords
License
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Abstract

Solvent extraction of Zr(IV) with TBP in kerosene was used to precipitate precursory zirconia which was then processed to produce ultrafine zirconia powders. The powder prepared was examined and characterized with transmission electron microscopy (TEM) and X-ray diffraction (XRD). Effects of the conditions of preparation on powder properties were especially investigated. It was found the precipitate was, gel-like material with heterogeneous porosity. The gel transformed to polycrystalline particles when calcined to ultrafine powder at 600 degrees C. The composition of the loaded organic phase and the conditions of washing the precipitate are two main factors affecting the properties of powder obtained. / Solvent extraction of Zr(IV) with TBP in kerosene was used to precipitate precursory zirconia which was then processed to produce ultrafine zirconia powders. The powder prepared was examined and characterized with transmission electron microscopy (TEM) and X-ray diffraction (XRD). Effects of the conditions of preparation on powder properties were especially investigated. It was found the precipitate was, gel-like material with heterogeneous porosity. The gel transformed to polycrystalline particles when calcined to ultrafine powder at 600 degrees C. The composition of the loaded organic phase and the conditions of washing the precipitate are two main factors affecting the properties of powder obtained.

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