Effects of time, temperature and precursor on solid state synthesis of α-TCP

The effects of solid state synthesis process parameters (time and temperature) and primary calcium precursor on the amount of produced α-tricalcium phosphate (Ca۳(PO۴)۲ or α -TCP) have been investigated. α-TCP was synthesized by firing of stoichiometric amount of calcium carbonate and monetite in first group and calcium carbonate and brushite in the second group, once at ۱۳۵۰°C for ۳,۶,۸,۱۶ h dwelling times and once at ۱۴۰۰°C for ۶h. In spite of quenching the heated mixtures of precursors from ۱۳۵۰°C and ۱۴۰۰°C, β-polymorph was formed as a second phase in resultant TCP. Meanwhile, the amount of α and β phases at each heating program were investigated through XRD and Rietveld refinement. It was found that wih identical heating programs, the amount of final α-TCP in the first group with monetite is more than the second group. Also increasing the dwell time from ۳h to ۱۶h and temperature from ۱۳۵۰°C to ۱۴۰۰°C increases the amount of α-TCP and reduces β-TCP subsequently.

کلیدواژه ها:

CPC ، solid state synthesis ، α ، TCP