Control of Ca/P Molar Ratio of Plate-shaped Hydroxyapatite Powders With an </i>a(b)</i>-axis Orientation and Their Thermal Stability : Figure 10

Figure 10: FT-IR spectra of the synthesized and hydrothermal-treated powders after heating at 1000˚C for 1 h: hydrothermal temperature (a) synthesized powders, (b) 100, (c) 120, (d) 140, (e) 160 and (f) 180˚C.