Thermal stability of porous A-type carbonated hydroxyapatite spheres

He, Qian; Huang, Zhi; Cheng, Xiao Kun; Yu, Jun

doi:10.1016/j.matlet.2007.06.001

Cited by 24 publications

(12 citation statements)

References 12 publications

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“…It has been suggested that the disordered orientation of CO 3 in the OH channel generates diminution of OH bands and the broadening of CO 3 bands. This implies that the ordered degree of the channel ions increases smoothly after calcination below 150 • C [30]. Finally, the disappearance of CH 3 and CH 2 groups is observed above 100 • C, along with a progressive decrease in intensity in amide groups (1657 cm −1 and 1511 cm −1 ), related to collagen decomposition and denaturing, respectively.…”

Section: Resultsmentioning

confidence: 82%

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Photothermal Radiometry and Diffuse Reflectance Analysis of Thermally Treated Bones

et al. 2010

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Different fields such as archaeology, biomedicine, forensic science, and pathology involve the analysis of burned bones. In this work, the effects of successive thermal treatments on pig long bones, measured by photothermal radiometry and diffuse reflectance are reported. Measurements were complemented by X-ray diffraction and infrared spectroscopy. Samples were thermally treated for 1 h within the range of 25 • C to 350 • C. The thermal diffusivity and reflectance increase in the low-temperature range, reaching a maximum around 125 • C and decaying at higher temperatures. These results are the consequence of complex modifications occurring in the inorganic and organic bone structure. For lower temperatures dehydration, dehydroxilation, and carbonate loss processes are dominant, followed by collagen denaturing and decompositions, which have an influence on the bone microstructure.

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Section: Resultsmentioning

confidence: 82%

“…These effects can be observed by DRX and FTIR. With further heating, the organic material is degraded and/or eliminated, as the FTIR spectra exhibit [30], originating a diminution of the thermal diffusion.…”

Section: Resultsmentioning

confidence: 99%

Photothermal Radiometry and Diffuse Reflectance Analysis of Thermally Treated Bones

et al. 2010

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“…The peak at 958 cm À1 results from the symmetric stretching ( 1 ) vibration of the P-O bonds, while the quite broad peak between 1038 and 1106 cm À1 can be assigned to the P-O asymmetric stretching ( 3 ) vibration (Guo et al, 2012;Zhu et al, 2011;Zou et al, 2012). In all these as-milled samples, there is a relatively broad band in the region 1400-1580 cm À1 due to the 3 stretching vibration of the carbonate group (Rehman & Bonfield, 1997;Chaikina et al, 2009;Ivankovic et al, 2007) which contains three overlapping frequencies of 3 , 1470 and 1550 cm À1 due to A-type carbonation and a small kink at 1419 cm À1 due to B-type carbonation (He et al, 2008(He et al, , 2007. The band at 878 cm À1 belongs to the 2 bending vibration of the C-O bonds in the carbonate group, which is characteristic of A-type carbonation in HAp.…”

Section: Resultsmentioning

confidence: 98%

Structural and microstructural interpretations of Zn-doped biocompatible bone-like carbonated hydroxyapatite synthesized by mechanical alloying

et al. 2015

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Single-phase nanocrystalline biocompatible Zn-doped A-type carbonated hydroxyapatite (A-cHAp) powder has been synthesized via mechanical alloying of a stoichiometric mixture of CaCO 3 , CaHPO 4 Á2H 2 O and ZnO powders in open air at room temperature by 10 h of milling. The A-type carbonation in HAp (A-cHAp) is confirmed by Fourier transform IR analysis. The structural and microstructural parameters of the as-milled powders are revealed by Rietveld powder structure refinement analysis and transmission electron microscopy. Zn substitution along with mechanical alloying causes partial amorphization of crystalline A-cHAp, analogous to native bone mineral. Zn 2+ cations substitute into the ninefold-coordinated Ca 2+ sites in the A-cHAp unit cell. An assay test using MTT [3-(4,5-dimethylthiazol-2-yl)-2,5-diphenyltetrazolium bromide] reveals a high percentage of cell viability and hence confirms the biocompatibility of the sample. The overall results indicate that the processed A-cHAp has a chemical composition very close to that of natural biological apatite.

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“…2 possibly because of an overhigh content of carbonate [15]. The vibration of CO 3 2− has its broad absorption bands at about 1547 cm −1 /1458 cm −1 /1420 cm −1 ( 3 ) and 874 cm −1 ( 2 ) [15,16]. The vibration peaks of PO 4 3− were Fig.…”

Section: Methodsmentioning

confidence: 98%

Synthesis and growth mechanism of carbonated hydroxyapatite whisker from natural collophanite via a template-directed homogeneous precipitation method

Zhang

Huang

Shi

et al. 2009

Journal of Alloys and Compounds

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Thermal stability of porous A-type carbonated hydroxyapatite spheres

Cited by 24 publications

References 12 publications

Photothermal Radiometry and Diffuse Reflectance Analysis of Thermally Treated Bones

Photothermal Radiometry and Diffuse Reflectance Analysis of Thermally Treated Bones

Structural and microstructural interpretations of Zn-doped biocompatible bone-like carbonated hydroxyapatite synthesized by mechanical alloying

Synthesis and growth mechanism of carbonated hydroxyapatite whisker from natural collophanite via a template-directed homogeneous precipitation method

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