Structural and mechanical characteristics of nanohydroxyapatite doped with zinc and chloride

Date

2013-04-01

Author

Uysal, I.
Severcan, F.
Evis, Zafer

Metadata

Show full item record

This work is licensed under a Creative Commons Attribution-NonCommercial-NoDerivatives 4.0 International License.

Item Usage Stats

164
views

0
downloads

In this study, hydroxylapatite (HA) doped with Zn2+ and/or Cl- ions was synthesised by precipitation method and sintered at 1100 degrees C for 1 h. Densities of the samples were measured by the Archimedes method. Zn2+ addition increased the density significantly, while Cl- increased the density insignificantly. Hydroxylapatite phase and inconsiderable amount of CaO phase were detected in some samples according to the X-ray diffraction results. Cl- added samples (2.5 mol.-%) increased the hexagonal unit cell volume of HA. Characteristic PO43- and OH- bands of HA were detected in Fourier transform infrared spectroscopy. Cl- related band was also observed at a wavenumber of 3497 cm(-1). Grain sizes of the samples decreased with Cl- addition and increased with Zn2+ addition according to the SEM images. Zn2+ and Cl- addition improved the microhardness of pure HA. Fracture toughness of the samples decreased with Cl- and Zn2+ addition. When compared with other compositions, 2Zn2.5ClHA produced the best results in terms of mechanical properties.

Subject Keywords

Bioceramics, Hydroxylapatite, X-ray diffraction, Sintering

URI

https://hdl.handle.net/11511/47288

Journal

ADVANCES IN APPLIED CERAMICS

DOI

https://doi.org/10.1179/1743676112y.0000000053

Collections

Department of Engineering Sciences, Article

Suggestions

OpenMETU
Core

Structural and mechanical investigations of magnesium and fluoride doped nanosize calcium phosphates Evis, Zafer (2010-12-01) Pure and Mg2+ and F doped nano-calcium phosphates (CaP), which were synthesized by a precipitation method to investigate their microstructural and mechanical properties. After the drying and calcination processes, the samples were sintered at 1100 degrees C for 1 hour. High densities were achieved except for the 7.5% mole Mg doped samples. Due to the Mg2+ substitution, beta-TCP phase was detected besides HAp, resulting in the formation of HAp/ beta-TCP biphasic composites with different compositions. The su...
Structural and mechanical characteristics of hydroxyapatite and tri-calcium phosphates doped with Al3+ and F- ions Tahmasebifar, A.; Evis, Zafer (2013-08-01) In this study, doping of aluminum (Al3+) and/or fluoride (F-) ions into tri-calcium phosphate (TCP)-hydroxyapatite (HA) composites at various compositions were performed to investigate their microstructure and mechanical properties. Composites were synthesized by a precipitation method and sintered at 1100 degrees C for 1 hr and 5 hrs. Densities of the sintered materials were increased by extending the sintering time and increasing the amount of Al3+ and F- doping. beta-TCP was observed as the main phase in...
Silver and fluoride doped hydroxyapatites: Investigation by microstructure, mechanical and antibacterial properties Turkoz, Mustafa; Atilla, Aykan Onur; Evis, Zafer (Elsevier BV, 2013-12-01) Hydroxyapatite co-doped with Ag+ and F- ions was synthesized by the precipitation method and sintered at 1100 degrees C for 1 h. Samples were characterized by density, X-ray diffraction, Fourier transform infrared spectroscopy, Raman spectroscopy, and scanning electron microscopy to investigate their microstructure, phase formation and bonding characteristics. Moreover, samples were also characterized by microhardness and antibacterial tests. Small amount of dopings resulted in high densities and fine grain...
Structural and mechanical investigations of magnesium and fluoride doped nano calcium phosphates Sun, Zehra Pınar; Evis, Zafer; Department of Micro and Nanotechnology (2009) The aim of this study was to investigate the microstructure and mechanical properties of pure and Mg2+ and F- doped nano-calcium phosphate (CaP) powders, which were synthesized by precipitation method. After the drying and calcination processes, the samples were sintered at 1100ºC for 1 hour. High densities were achieved except for the 7.5 % mole Mg doped samples. Microstructure of the CaPs were investigated by X- ray diffraction (XRD), Fourier Transform Infrared Spectroscopy (FTIR) and Scanning Electron Mi...
Synthesis and microstructural characterization of nano-size calcium phosphates with different stoichiometry Ergun, Celaletdin; Evis, Zafer; Webster, Thomas J.; Sahin, Filiz Cinar (Elsevier BV, 2011-04-01) Calcium phosphates with Ca/P molar ratios of 0.5, 0.75, 1.33, 1.5, 1.55, 1.67, 2.0, and 2.5 were synthesized by a wet chemistry precipitation method and sintered at 500 degrees C, 700 degrees C, 900 degrees C, 1100 degrees C and 1300 degrees C for 2 h. Presence of phases and microstructures of calcium phosphates were determined by X-ray diffraction and scanning electron microscopy. In all different Ca/P ratios, the precipitated phase was always hydroxyapatite with very small size and/or partial disorderness...

Citation Formats

I. Uysal, F. Severcan, and Z. Evis, “Structural and mechanical characteristics of nanohydroxyapatite doped with zinc and chloride,” ADVANCES IN APPLIED CERAMICS, pp. 149–157, 2013, Accessed: 00, 2020. [Online]. Available: https://hdl.handle.net/11511/47288.