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I. O. Marek, O. K. Ruban, V. P. Redko, M. I. Danylenko, and O. V. Dudnik
«Nanocrystalline Powders Based on ZrO2 for Fabrication of Composites Stable to Ageing»
091–098 (2017)

PACS numbers: 61.43.Gt, 61.50.Ks, 62.23.Pq, 81.07.Wx, 81.10.Dn, 81.30.Kf, 81.40.Cd

Nanocrystalline powders of solid solutions based on ZrO2 (mol.%), 97ZrO2–3Y2O3, 90ZrO2–2Y2O3–8CeO2, are fabricated by the hydrothermal synthesis in an alkaline medium. The powder-properties’ variations are investigated after heat treatment in the temperature range 400–1300?C. X-ray diffraction methods, differential-thermal and chemical analyses, electron microscopy and BET method are used for the investigation of the powder properties. The formation of thermodynamically nonequilibrium system, which includes a mixture of low-temperature metastable cubic solid solution based on ZrO2 (F-ZrO2) and tetragonal solid solution based on ZrO2 (t-ZrO2), is revealed after the hydrothermal synthesis of powders. The primary-particles’ size is less than 10–15 nm. Specific surface of powders is varying from 1 to 99 m2/g.

Key words: zirconia, yttrium oxide, cerium oxide, hydrothermal synthesis, ZrO2-based solid solution, ageing.

https://doi.org/10.15407/nnn.15.01.0091

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