Solubility controlling of the precursor powders of magnesium phosphate cement by changing the powder composition

One of the important factors to introduce a cement as an injectable one is to control the setting time of the cement. In this paper to control the setting time of magnesium phosphate cement, the effect of addition of calcium and sodium on phase composition and the solubility of its precursor powders was evaluated. Three phosphate precursor powders that contained only Mg, Mg–Na and Mg–Na–Ca were synthesised via an emulsion precipitation method. Phase composition, particle size distribution and solubility of the powders were determined by XRD, laser particle size analyser and ionic chromatographic methods, respectively. Addition of calcium and sodium decreased the mean size of the powder significantly from 114 to 12 µm. Furthermore, solubility of the powders decreased by the addition of calcium and sodium.