Biomaterials Science: Processing, Properties and Applications IV: Ceramic Transactions, no.4, pp.31-43, 2014 (Conference Book)
Calcium phosphates (CaP) are frequently used in medical applications due to their high
biocompatibility in the human body. In this study, nano-sized CaPs (with Ca/P molar ratios of 1,
1.25, 1.5, 1.67, and 2) doped with titanium (Ti ) and fluoride (F ) ions were synthesized by a
precipitation method and sintered at 1300°C for lh. These bioceramics were characterized by
XRD, FTIR, SEM and micro-hardness. It was observed that high amount of Ti4+
led to a
decrease in densification when Ca/P ratio was 1.50 and 2.0 at 1300°C. Densities of the F"
addition revealed considerable decreases at 1300°C. According to the SEM results, the average
grain sizes of the doped and undoped samples decreased when Ca/P ratio increased. As a result
of Vickers microhardness test, Ti4+
ion addition in large amounts decreased the n-hardness of the
samples at 1300°C, except samples with molar ratio of 1.0 and 2.0 at 1300°C.