Processing and Characterization of Magnesium Containing Β-Tricalcium Phosphate Ceramics
13th International Conference of the European Ceramic Society: Book of Abstracts 2013
Līga Stīpniece, Kristīne Šalma-Ancāne, Natālija Borodajenko, Dmitrijs Jakovļevs, Līga Bērziņa-Cimdiņa

Calcium phosphate based ceramics are biocompatible, bioactive and/or bioresorbable and thereby considered to be promising bone replacement materials. Preliminary scientific research points to the presence of magnesium in calcified living tissue, suggesting that magnesium ions might improve the biocompatibility and bioactivity of calcium phosphates ceramics. Modification of the chemical composition provides a simple but powerful approach in tailoring the properties of synthetic calcium phosphates. According to literature, the incorporation of magnesium ions stabilizes the β-tricalcium phase, increasing its transition temperature to α-tricalcium phosphate. This work reports a systematic investigation on magnesium substituted β-tricalcium phosphate. Pure and magnesium substituted β-tricalcium phosphate powders containing different amounts of magnesium were prepared by the modified wet chemical method – precipitation from an aqueous medium by slow addition of orthophosphoric acid solution to a mixture of calcium hydroxide and magnesium hydroxide, followed by subsequent sintering at high temperatures. Various concentrations of magnesium in products were provided by changing the added amount of magnesium hydroxide into synthesis media (in the range of 0.0-3.0 weight% of the total volume of suspension of calcium hydroxide and magnesium hydroxide). Comprehensive characterization techniques were used to evaluated the influence of different amount of magnesium on the molecular and phase composition, morphological characteristics, microstructure, and sintering behaviour of magnesium substituted β;-tricalcium phosphate powders. X-ray diffraction analysis (XRD) together with differential thermal analysis (DTA) was combined in order to characterize the thermal stability and phase transformations during annealing of obtained powders. Microphotographs taken with field emission scanning electron microscope (FE-SEM) and results of chemical element analysis realized by energy dispersive X-ray spectroscopy (FE-SEM/EDX) show that as-synthesized powders are calcium deficient apatite (in good agreement with XRD and Fourier transform infrared spectroscopy (FT-IR)) made up of needle-like particles and contain different concentrations of magnesium ions.


Atslēgas vārdi
β-tricalcium phosphate; Mg-substitution; thermal stability

Stīpniece, L., Šalma-Ancāne, K., Borodajenko, N., Jakovļevs, D., Bērziņa-Cimdiņa, L. Processing and Characterization of Magnesium Containing Β-Tricalcium Phosphate Ceramics. No: 13th International Conference of the European Ceramic Society: Book of Abstracts: 13th Internation Conference of the European Ceramic Society, Francija, Limoges, 23.-27. jūnijs, 2013. Limoges: ECERS, 2013, 341.-341.lpp.

Publikācijas valoda
English (en)
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