Yttria-stabilized-zirconia hollow spheres prepared by atmospheric plasma spray

- ZrO2-7wt%Y2O3 (7YSZ) hollow spheres were prepared by atmospheric plasma spray with 7YSZ powders.
- The as-prepared hollow spheres have similar composition and phases to the raw 7YSZ powders.
- No phase transformation appeared when annealing temperature below 1400 °C.
- Segregation of doped Mg, Al in produced spheres during APS and annealing processes was observed.