Inserting of strontium during coating of hydroxyapatite compound on titanium substrate
by E.A. Abdel-Aal
International Journal of Nanoparticles (IJNP), Vol. 4, No. 1, 2011

Abstract: For the first time, strontium hydrogen phosphate, SrHPO₄ (SrHP) with or without brushite (dicalcium phosphate dihydrate CaHPO₄.2H₂O) is electrocrystallised on titanium substrate by electrochemical deposition technique. SrHP is converted to strontiumapatite, Sr₁₀ (PO₄)₂(OH) ₂. Different Ca substitution percentages by Sr were applied ranged from 0% to 100%. The electrolyte was 0.167 M CaCl₂, 0.167 M SrCl₂ and 0.1 M NH₄H₂PO₄. The results showed that at all Sr substitution percentages (0%-100%) and at coating time of one hour, the coating layer is brushite or strontium hydrogen phosphate at 100% Ca substitution by Sr. Furthermore, with increasing Ca substitution by Sr percentages from 0% to 100%, the coating thickness is significantly decreased. Moreover, with increasing Ca substitution by Sr percentages (0%-100%), the morphology and composition are changed. Thickness and weight gain are decreased with sodium hydroxide treatment.

Online publication date: Fri, 13-Mar-2015

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