Table 1.

Vickers hardness and fracture toughness of samples with optimal in-line transmittance.

Sample	Content of Zirconia (wt%)	Average Grain Size of HIPed Sample (μm)	Pre-Sintering Temperature (°C)	Vickers Hardness (GPa)	$\mathrm{Fracture}\mathrm{Toughness}\left(\mathrm{MPa}\sqrt{\mathit{m}}\right)$
A1	0	1.3	1500	14.47 ± 0.14	1.41 ± 0.04
B1	0.01	1.7	1500	14.23 ± 0.37	1.47 ± 0.04
C1	0.05	2.0	1500	14.18 ± 0.15	1.43 ± 0.04