Abstract
In this study, investigation of the Ca–P–O, Ca:Zn–P–O, Ca:Na–P–O, and Ca:Zn:Na–P–O precursor gels prepared using EDTA as complexing agent and slightly different starting materials was performed. For this purpose, thermal decomposition of the gels was studied by TG/DTA-EGA/MS with following evolvement of H2O, CO2, NH3, and NOx gases. Besides, thermal decomposition products were characterized by Fourier transform infrared spectroscopy, X-ray diffraction analysis, and scanning electron microscopy. It was demonstrated that thermal decomposition of Ca–P–O acetate and Ca:Zn–P–O, Ca:Zn:Na–P–O acetate-nitrate gels is different. Thus, the results of thermal decomposition of Ca:Zn–P–O and Ca:Zn:Na–P–O gels showed that Zn and Na additives accelerate decomposition of the gels. In addition, Na substitution at Ca sites creates conditions for the formation of the orthophosphate composites at lower temperatures.
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This research was funded by a grant No. ERMOS 131.
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Bogdanoviciene, I., Cepenko, M., Traksmaa, R. et al. Formation of Ca–Zn–Na phosphate bioceramic material in thermal processing of EDTA sol–gel precursor. J Therm Anal Calorim 121, 107–114 (2015). https://doi.org/10.1007/s10973-015-4507-2
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DOI: https://doi.org/10.1007/s10973-015-4507-2