| Dopant Ion Concentration and Calcination Temperature
Dependent Crystallographic Behaviour of Fluoride
and Iron Doped Hydroxyapatite |
Samina Ahmed,1,* Farah Nigar,1 Ahmad Ismail Mustafa2, 3 and Mainul Ahsan1
Pages : 215-221
DOI : 10.1080/0371750X.2017.1352459 |
| Abstract |
| This research work explores the crystallographic properties of synthesized F– and Fe3+
doped hydroxyapatites (HAPs) as a function of dopant ion concentration coupled with
thermal treatment. Doped HAPs were synthesized using eggshell as the prime source of
Ca while X-ray diffraction technique enabled the investigation of desired crystallographic
parameters. Observed results attributed that fluoride substitution facilitated the formation
of bi-phasic HAP while iron substitution resulted in apatite with single phase.
Crystallographic information revealed that gradual increase of F– ion concentration
expedited percentage increase in crystallite size, fraction of crystallinity and crystallinity
index of fluoride doped hydroxyapatite (F-HAP) and thus microstrain, dislocation density
reduced. Nevertheless, in case of iron doped apatite the scenario was in reverse direction.
For both categories of doped HAPs enhanced crystallinity was achieved by thermal
treatment. This is because higher temperature accelerated the small sized grains to be in
amalgamated form producing larger grains.
[Keywords: Bioceramics, Calcination, Doping, Hydroxyapatite, Wet chemical
synthesis] |
| Full text : Subscribe to Download Full Text |
| [Go Back] |
|
