Sintering of Ce3+-doped yttria nanoparticles prepared by precipitation method
Nibu Putenpurayil Govindan,
Aliasghar Najafzadehkhoee,
Ali Talimian,
Vaclav Pouchly,
Monika Michálková,
Peter Švančárek,
Róbert Klement,
Dušan Galusek
Affiliations
Nibu Putenpurayil Govindan
FunGlass - Centre for Functional and Surface Functionalized Glass, TnUAD, Trenčín, Slovakia
Aliasghar Najafzadehkhoee
Joint Glass Center of the IIC SAS, TnU AD, and FChPT STU, Trenčín, Slovakia; Corresponding author.
Ali Talimian
FunGlass - Centre for Functional and Surface Functionalized Glass, TnUAD, Trenčín, Slovakia
Vaclav Pouchly
CEITEC BUT, Brno University of Technology, Purkynova 123, Brno, Czech Republic; Faculty of Mechanical Engineering, Brno University of Technology, Technicka 2, Brno, Czech Republic
Monika Michálková
Joint Glass Center of the IIC SAS, TnU AD, and FChPT STU, Trenčín, Slovakia
Peter Švančárek
Joint Glass Center of the IIC SAS, TnU AD, and FChPT STU, Trenčín, Slovakia
Róbert Klement
FunGlass - Centre for Functional and Surface Functionalized Glass, TnUAD, Trenčín, Slovakia
Dušan Galusek
FunGlass - Centre for Functional and Surface Functionalized Glass, TnUAD, Trenčín, Slovakia; Joint Glass Center of the IIC SAS, TnU AD, and FChPT STU, Trenčín, Slovakia
Cerium doped yttrium oxide nanoparticles with various Ce3+ concentrations between 0.001 and 0.010 at% have been synthesised by precipitation method using ammonium hydroxide as a precipitation agent. The synthesised powders are characterised by a mean particle size of ca. 55 nm. Highly dense specimens, with a relative density> 98.8%, were obtained by sintering the green compacts shaped by pressure filtration, at 1550 °C for 3 h in air. The sintering behaviour of Ce3+ doped Y2O3 was studied by constructing Master Sintering Curves (MSC); the results showed that the apparent activation energy of sintering for Ce3+ doped Y2O3 increases with the increase of cerium concentration. The segregation of larger Ce3+ cations in the grain boundaries is likely to be responsible for the increase in the sintering activation energy.
