The Effect of Sodium Dopants on Calcium Polyphosphate Biomaterials
Sodium-doped CPP was synthesized using three dopant sources (sodium carbonate, sodium hydroxide and sodium phosphate). These materials were analyzed by XRD to determine phase composition and by differential thermal analysis to identify phase transition temperatures. Sintering of resulting glass powders showed that both dopant source and dopant concentration affects sinter neck formation and crystallinity. The open porosity of sodium phosphate and sodium carbonate doped samples at 0.1 Na2O/CaO sintered at different temperatures changed significantly. Crystallization of the construct during sintering was noted at temperatures lower than expected.
Guy Daculsi and Pierre Layrolle
J. Ue et al., "The Effect of Sodium Dopants on Calcium Polyphosphate Biomaterials", Key Engineering Materials, Vols. 361-363, pp. 281-284, 2008