Structural and mechanical characteristics of nanohydroxyapatite doped with zinc and chloride

2013-04-01
Uysal, I.
Severcan, F.
Evis, Zafer
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.

Citation Formats
I. Uysal, F. Severcan, and Z. Evis, “Structural and mechanical characteristics of nanohydroxyapatite doped with zinc and chloride,” ADVANCES IN APPLIED CERAMICS, vol. 112, no. 3, pp. 149–157, 2013, Accessed: 00, 2020. [Online]. Available: https://hdl.handle.net/11511/47288.