Commercial hydroxyapatite (HA) powders were calcined at the temperature range of 1000-1350℃ in air and the calcined powders were immersed in pH 7.4 distilled water at 37℃ for 3, 7 or 14 days. Decomposition and related dissolution behaviors of hydr...
Commercial hydroxyapatite (HA) powders were calcined at the temperature range of 1000-1350℃ in air and the calcined powders were immersed in pH 7.4 distilled water at 37℃ for 3, 7 or 14 days. Decomposition and related dissolution behaviors of hydroxyapatite were investigated by XRD, FT-IR. and TEM observation. HAp initiated to decompose to TCP (Tricalcium phosphate) and TTCP (Tetracalcium phosphate) phase at 1350℃ and these non-stoichiometric phases induced the dissolution of hydroxyapatite powders due to the high solubility of TCP and TTCP.