Synthesis of nanometric zirconia powders by hydrothermal reactions of Zr (IV) peroxide precursors
by Robert Piticescu, Tudor Segarceanu, Mircea Gorinoiu, Teodor Velea
International Journal of Materials and Product Technology (IJMPT), Vol. 15, No. 3/4/5, 2000

Abstract: Hydrothermal reaction of a Zr(IV) peroxide precursor in the temperature range 110-180°C was used to produce nanocrystalline zircon ia powders. Cubic metastable ZrO₂ is formed with or without the presence of is formed with or without the presence of ₂O₃ or CeO₂ as stabilising agents. After firing 2h at 1000°C the pure ZrO₂ powder remains cubic while the doped powders transforms to tetragonal ZrO₂. The influence of Zr concentration and treatment temperature on the crystallite sizes are presented. The kinetic constant for the nucleation of cubic zirconia phase was also calculated according to Avrami's kinetic equation.

Online publication date: Tue, 01-Jul-2003

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