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The effects of the addition of Er 2 O 3  on the grain growth and sinterability of c-ZrO 2  were investigated using 8 mol.% yttria-stabilized cubic zirconia (c-ZrO 2 ) and various amounts of Er 2 O 3 . For these purposes, the content of 0–15 wt.% Er 2 O 3  and c-ZrO 2  powders were doped using a colloidal process. Undoped and Er 2 O 3 -doped c-ZrO 2  specimens were annealed for grain growth at different temperatures and holding times. An increase in annealing temperature and holding time caused grain growth in all specimens. Activation energy of the undoped c-ZrO 2  obtained was 358 kJ mol −1  and the activation energies of 1, 5, 10 and 15 wt.% Er 2 O 3 -doped specimens obtained were 388, 403, 432 and 476 kJ mol −1 , respectively. While excessive grain coarsening in the undoped c-ZrO 2  was observed, a lesser level of grain growth occurred in the Er 2 O 3 -doped specimens, due to the segregation of Er 2 O 3  at the grain boundaries and the restriction in the grain boundaries mobility of c-ZrO 2 .

Grain growth and sinterability in Er 2 O 3 -doped cubic zirconia (c-ZrO 2 )