Effect of MgO addition on solid state synthesis and thermal behavior of beta-tricalcium phosphate

Abstract

In the present work the effect of Mg2+ ion doping (1–14mol%) on the solid state synthesis of beta-tricalcium phosphate (β-TCP) powder and its thermal behaviour is investigated. The powders are synthesized at temperatures between 1000 and 1300°C for 2h, starting from brushite (hydrated calcium hydrogen phosphate—CaHPO4·2H2O) and calcium carbonate (Ca CO3). The maximum substitution of Mg2+ ion in β-TCP lattice decreases from >14mol% to less than 8mol% as the synthesis temperature increases from 1000 to 1300°C. It is also found that already in 1mol% MgO doped powders the β-TCP phase is stabilized at temperatures higher than 1500°C.