Fig. 3

XRD patterns of sintered HA at different temperature for 4 h: a 200 °C, b 600 °C, c 800 °C, d 1000 °C, e 1100 °C and f 1200 °C
XRD patterns of sintered HA at different temperature for 4 h: a 200 °C, b 600 °C, c 800 °C, d 1000 °C, e 1100 °C and f 1200 °C