Title: Synthesis of nanometric zirconia powders by hydrothermal reactions of Zr (IV) peroxide precursors

Authors: Robert Piticescu, Tudor Segarceanu, Mircea Gorinoiu, Teodor Velea

Addresses: Research Institute for Non-ferrous & Rare Metals, 102 Biruintei, Bucharest 2, Romania. Research Institute for Non-ferrous & Rare Metals, 102 Biruintei, Bucharest 2, Romania. Research Institute for Non-ferrous & Rare Metals, 102 Biruintei, Bucharest 2, Romania. Research Institute for Non-ferrous & Rare Metals, 102 Biruintei, Bucharest 2, Romania.

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.

Keywords: nanometric zirconia powders; Zr(IV) peroxide precursors.

DOI: 10.1504/IJMPT.2000.001253

International Journal of Materials and Product Technology, 2000 Vol.15 No.3/4/5, pp.252-259

Published online: 01 Jul 2003 *

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