Structural and mechanical investigations of magnesium and fluoride doped nanosize calcium phosphates

Date

2010-12-01

Author

Evis, Zafer

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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 substitutions of the ions have been verified by the decrease in the hexagonal unit cell volumes of the doped CaPs. FTIR spectra revealed the characteristic absorption bands of HAp, beta-TCP and the ones that were resulted from the F-OH bonds. In general, the microhardness and diametral tensile strength tests revealed that Mg2+ ions in large amounts (7.5% mole) had negative effects on the micro hardness of the samples, while substitution of the F- ions had a positive effect on their mechanical properties.

Subject Keywords

Biomaterials, Sintering, X-ray diffraction, Mechanical properties

URI

https://hdl.handle.net/11511/53385

Journal

JOURNAL OF CERAMIC PROCESSING RESEARCH

Collections

Department of Engineering Sciences, Article

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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...
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STRUCTURAL INVESTIGATION OF NANO HYDROXYAPATITES DOPED WITH Mg(2+) AND F(-) IONS Sun, Z. P.; Evis, Zafer (2009-01-23) Pure and Mg(2+) & F(-) doped nano hydroxyapatites (HA) were synthesized by a precipitation method and sintered at 1100 degrees C to investigate their densification and structure. Different amounts of Mg(2+) and F ions were doped in to HAs. X-ray diffraction was used to identify the presence of phases And lattice parameters of HA and tri-calcium phosphates (TCP) present in the samples. Densification of HA was improved by the addition of these ions. In most of the doped samples, beta-tri-calcium phosphate (TC...

Citation Formats

Z. Evis, “Structural and mechanical investigations of magnesium and fluoride doped nanosize calcium phosphates,” JOURNAL OF CERAMIC PROCESSING RESEARCH, pp. 701–715, 2010, Accessed: 00, 2020. [Online]. Available: https://hdl.handle.net/11511/53385.