Preparation and characterization of Ln2Zr2O7 microspheres by an inorganic sol-gel route
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Free-flowing Ln2Zr2O7 microspheres (Ln=lanthanide) were prepared by an aqueous inorganic sol-gel route without any intermediate phase formation. The gel spheres obtained at room temperature were shown by X-ray diffraction to be amorphous but calcination to 750 °C produced fully crystalline fluorite phases. On calcination to 850 °C, pyrochlore phases were formed with suitable lanthanides. The microspheres were characterized by X-ray diffraction and scanning electron microscopy with energy dispersive analysis of X-rays to give accurate determination of structure, composition and crystallite size.
KeywordsPolymer Microscopy Electron Microscopy Scanning Electron Microscopy Calcination
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- 2.K. J. De Vries, T. Van Dijk and A. J. Burggraaf, “Fast ion transport in solids”, (Elsevier, North Holland, 1979).Google Scholar
- 6.A. J. Burggraaf, M. P. Van Dijk, M. J. Verkerk and K. J. de Vries, in “Studies in inorganic chemistry”, vol. 3 (Elsevier, 1983) p. 185.Google Scholar
- 10.K. J. de Vries, M. P. Van Dijk, G. M. H. Van De Velde and A. J. Burggraaf, in “Studies in Inorganic Chemistry”, Vol. 3 (Elsevier, 1983) p. 283.Google Scholar
- 11.T. Van Dijk, M. A. C. G. Van De Graff, T. Van Dijk, M. A. De Jongh and A. J. Burggraaf, Sci. Ceram. 9 (1977) 75.Google Scholar
- 13.H. Kido, S. Komarneni and R. Roy, J. Am. Chem. Soc. 74 (1991) 422.Google Scholar
- 14.A. K. Bhattacharya, A. Hartridge and K. K. Mallick, J. Mater. Sci. (1993) in press.Google Scholar
- 15.Idem, to be published.Google Scholar