Figure 5.
SEM-EDS images of samples HT at (a) 700 °C, (b) 900 °C, and (c) 1100 °C; samples HT at 900 °C and 1100 °C show the grain-size distribution (inset), with an average grain size of 458 nm (900 °C) and 542 nm (1100 °C).
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