Self-Diffusion in Polycrystalline Yttrium Oxide

The self‐diffusion coefficient of yttrium in polycrystalline yttrium oxide determined in the temperature range 1400° to 1800°C is $${\text{D=2.41×10}}^{\text{−4}}\hspace{0.17em}\exp \text{(−43\hspace{0.17em}900/RT)\hspace{0.17em}}{\mathrm{cm}}^2/\sec$$ .