University of PardubiceFaculty of Chemical Technology

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The Effect of Substitution on Properties and Structure of Hydroxyapatite

Authors: Šimková Lenka | Šulcová Petra

Year: 2020

Type of publication: ostatní - přednáška nebo poster

Page from-to: nestránkováno

Titles:

Language	Name	Abstract	Keywords
eng	The Effect of Substitution on Properties and Structure of Hydroxyapatite	The objective of this work is a partial replacement of the calcium ions in the hydroxyapatite structure by other ions (Mg2+, Zn2+, Al3+, Sr2+) and subsequently evaluated the effect of these substitutions on the structure and physicochemical properties of hydroxyapatite. For selecting the convenient synthesis conditions for the formation of pure and doped HAP phase, the thermodynamic stability of pure HAP in aqueous solution was analyzed. The selected precipitation conditions (Ca/P ratio, range of pH, precipitation speed), were applied for the synthesis of doped HAP. The obtained powders were aged for 1 day, then filtered and washed with distilled water to neutral pH and dried at 80 °C for 6 h. The synthesized powders were further characterized in terms of crystallinity size and their morphology by scanning electron microscope (SEM, Tescan Lyra 3, CR), the phase composition was studied by the X-ray diffraction analysis (XRD, Rigaku, Japan) and the thermal stability of hydroxyapatite was tested by the DTA/TG analysis (NETZSCH, Germany). In terms of the corrosion inhibitor, preliminary corrosion tests were executed, including the determination of pH and resistivity of aqueous suspensions of pigments (10 %), gravimetric determination of weight loss of the steel plates and determination of corrosion indicators for steel plates.	Hydroxyapatite;Synthesis;DTA/TG;Corrosion tests