Table 3: Vickers microhardness of doped perovskites samples.

SampleVickers hardness 
(GPa)

STO_0.5% Tm_1350°C9.61 ± 0.86
STO_2% Tm_1350°C9.76 ± 0.56
STO_5% Tm_1350°C9.16 ± 0.73