Primary hepatoma

Synthesis and sintered properties evaluation of calcium phosphate ceramics

“…With an increase in calcination temperature HA would have started losing hydroxyl groups forming various phosphates. This is in agreement with those reported earlier by Kutty [17] and Skinner et al [18]. In a truly anhydrous system, hydroxyapatite should not appear due to the following dehydroxylation reaction given in Eq.…”

A novel method to synthesize nanocrystalline hydroxyapatite: Characterization with x-ray diffraction and infrared spectroscopy

“…Results and discussion X-ray diffraction patterns of all HA samples treated at different temperature are shown in Figure 1and The presence of CaO after heat treatment is in agreement with the results reported by Kutty [15], Skinner [16] and A. Costescu [17]. With the increase of the calcination temperature HA would have started losing hydroxyl groups forming various phosphates.…”

Hydroxyapatite Implant Materials with Pore Size Gradients

“…Although decomposition of HOAp after prolonged sintering below the critical temperature of 1300°C can not be excluded [15], no crystalline decomposition products could be detected by X-ray powder diffraction analysis after sintering at 1250°C for 2 h. The density of bead free HOAp tapes attained 92 % of the theoretical density of HOAp (3.155 g/cm) with 0.3 % open porosity [13].…”