Author： Shevchenko A. Dudnik E. Ruban A. Vereschaka V. Red’ko V. Lopato L.
Publisher： Springer Publishing Company
ISSN： 1068-1302
Source： Powder Metallurgy and Metal Ceramics, Vol.46, Iss.1-2, 2007-01, pp. : 18-24
Disclaimer: Any content in publications that violate the sovereignty, the constitution or regulations of the PRC is not accepted or approved by CNPIEC.
Abstract
The paper examines the properties of the nanocrystalline powder 95 mole% ZrO2-2 mole% CeO2-3 mole% Y2O3, synthesized using a combination of two methods: coprecipitation and hydrothermal decomposition. It is established that coprecipitation produces an x-ray amorphous gel consisting of hard agglomerates from 5 to 10 µm and having a specific surface area of 120 m2/g and a bottle density of 2.94 g/cm3. Hydrothermal synthesis results in a low-temperature metastable cubic solid solution based on ZrO2 (F-ZrO2). Its specific surface area is 101.6 m2/g and bottle density is 4.65 g/cm3. Soft agglomerates (0.5–10 µm) consist of primary particles with sizes to 10 nm. The change in hydrothermal suspension processing steps results in soft agglomerates with branched internal porosity. This method allows synthesizing powders of needed compositions in the ZrO2-CeO2-Y2O3 system.
Related content
Access to resources
Recommend
