926537.fig.005a
(a)
926537.fig.005b
(b)
926537.fig.005c
(c)
926537.fig.005d
(d)
926537.fig.005e
(e)
926537.fig.005f
(f)
Figure 5: SEM micrographs of the samples sintered at 1350°C: (a) and (b) STO_0.5% Tm; (c) and (d) STO_2% Tm; (e) and (f) STO_5% Tm.