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An experimental and theoretical investigation of Co-containing hydroxyapatites prepared at different temperatures

An experimental and theoretical investigation of Co-containing hydroxyapatites prepared at... In the present paper, the effects of various calcination temperatures of 675, 775, 875, and 975 °C on the structural properties of 0.8 at.% Co-containing hydroxyapatites (HAps) were investigated by using X-ray diffraction (XRD) analysis, Fourier transform infrared (FTIR) spectroscopy, differential thermal analysis (DTA), and scanning electron microscopy (SEM). A density functional theory (DFT) has been applied to find out the energy band gap and density of states (DOS). It was found that the crystallite size and lattice strain gradually increased with increasing temperature. For each sample, biphasic structure was observed. The phase distribution was affected by the temperature. The significant changes, dependent on the calcination temperature, in the crystallinity percent, stress, and anisotropic energy density values were detected. The functional groups of phosphate and hydroxyl associated with the formation of the HAp phase were detected for each sample. It was observed that the calcination temperature affected the morphology. http://www.deepdyve.com/assets/images/DeepDyve-Logo-lg.png Journal of the Australian Ceramic Society Springer Journals

An experimental and theoretical investigation of Co-containing hydroxyapatites prepared at different temperatures

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Publisher
Springer Journals
Copyright
Copyright © The Author(s) under exclusive licence to Australian Ceramic Society 2022
ISSN
2510-1560
eISSN
2510-1579
DOI
10.1007/s41779-022-00744-z
Publisher site
See Article on Publisher Site

Abstract

In the present paper, the effects of various calcination temperatures of 675, 775, 875, and 975 °C on the structural properties of 0.8 at.% Co-containing hydroxyapatites (HAps) were investigated by using X-ray diffraction (XRD) analysis, Fourier transform infrared (FTIR) spectroscopy, differential thermal analysis (DTA), and scanning electron microscopy (SEM). A density functional theory (DFT) has been applied to find out the energy band gap and density of states (DOS). It was found that the crystallite size and lattice strain gradually increased with increasing temperature. For each sample, biphasic structure was observed. The phase distribution was affected by the temperature. The significant changes, dependent on the calcination temperature, in the crystallinity percent, stress, and anisotropic energy density values were detected. The functional groups of phosphate and hydroxyl associated with the formation of the HAp phase were detected for each sample. It was observed that the calcination temperature affected the morphology.

Journal

Journal of the Australian Ceramic SocietySpringer Journals

Published: Apr 25, 2022

Keywords: Hydroxyapatite; Sol-gel synthesis; X-ray diffraction (XRD); Scanning electron microscopy

References