Preparation, structure and solubility of Ca2KNa(PO4)(2)

Materials based on calcium alkali orthophosphate using for filling bone def ects have been fabricated by means of solid state reaction method. The star ting materials were selected from chemical reagents: CaHPO4 . 2H(2)O, CaCO3 , Na2CO3, K2CO3 and H3PO4(85%). After these materials were mixed stoichiome trically and dried at 200 degreesC for 2 hours, the mixture was sintered in air at high temperature for 2 hours. The samples were characterized by X-r ay diffraction. The results showed that the new materials contained only on e crystal phase: Ca2KNa(PO4)(2), whether the sintering temperature was 1350 degrees C or higher if the material was designed as Ca2KNa(PO4)(2). Furthe rmore, the solubility was tested and it revealed that these materials conta ining Ca2KNa(PO4)(2) had higher solubility than alpha -TCP. (C) 2001 Kluwer Academic Publishers.