Preparation of calcium phosphate nano-powders prepared by sol-gel assisted-electrostatic spraying method

The preparation of calcium phosphate nano-powders by sol-gel assisted-electrostatic spraying method was discussed. The calcium nitrate and phosphoric acid were used as reactants for synthesis of CaP powders. The amorphous as-dried powder transformed to CaP crystals at 500°C, in the XRD pattern. The sol was diluted with methanol to adjust the concentration and viscosity for preparing nano-powders by ESS. The crystal structure of the annealed powders was characterized by X-ray diffraction (XRD). The FTIR analysis was performed in order to confirm the chemical structure of annealed powder. The FTIR result indicates that carbon may instead dissolve into the CaP crystal for the annealed powder.