Properties of Crystallizing and Absorbing F~- Ion of HAP Synthesized by Sol-Gel Process

Hydroxyapatite (HAP) was prepared by a sol-gel process. XRD, IR, BET measurement and static -dynamic absorption test were used to study the absorbing mechanism and action, to analyze the specific surface area, degree of crystallization and lattice defect, crystalline size, thermal stabilization and equilibrium capacities of absorbing F- ion of the HAP synthesized by changing the molar ratio of Ca to P and calcination temperature. Test results indicate that the HAP can be used as green environment protection material, as the result of its strong ability of absorbing F- ion under the operating conditions of common temperature and common pressure and non-secondary pollution.