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SEM images of unpolished cylinders after 3 h of sintering at 1100 °C of 4 selected Ca/P molar ratios: (a) 1.442; (b) 1.478; (c) 1.500 and (d) 1.552. These cylinders were all made out of β-TCP powders calcined at 850 °C for 1 h. The scale bar is 2 μm for all 4 images.
