Fig. 2. (Color online) SEM images of BiFeO3 ceramics: (a) furnace-cooled after sintering at 810 °C, (b) air-cooled after sintering at 810 °C, (c) furnace-cooled after sintering at 830 °C, (d) air-cooled after sintering at 830 °C, and (e) furnace-cooled after sintering at 850 °C, and (f) air-cooled after sintering at 850 °C.
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