X-ray peak broadening studies of nanocrystalline hydroxyapatite by Williamson–Hall analysis

Venkateswarlu, K.; Bose, A. Chandra; Rameshbabu, N.

doi:10.1016/j.physb.2010.07.020

Cited by 394 publications

(169 citation statements)

References 23 publications

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“…The instrumental corrected broadening β hkl [12] corresponding to the diffraction peaks of HA and FA was estimated using the equation…”

Section: B Determination Of Crystallite Size Of Ha and Fa By Scherrementioning

confidence: 99%

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X-Ray Peak Profile Analysis of Nanostructured Hydroxyapatite and Fluorapatite

Venkateswarlu¹,

Sreekanth²,

Sandhyarani³

et al. 2012

IJBBB

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“…The instrumental corrected broadening β hkl [12] corresponding to the diffraction peaks of HA and FA was estimated using the equation…”

Section: B Determination Of Crystallite Size Of Ha and Fa By Scherrementioning

confidence: 99%

“…Assuming that the strain present in HA and FA crystals is isotropic, the W-H equation [12] for the total peak broadening is given by cos 4 sin…”

Section: Estimation Of Lattice Strain (ε) and Crystallite Size (Dvmentioning

confidence: 99%

X-Ray Peak Profile Analysis of Nanostructured Hydroxyapatite and Fluorapatite

Venkateswarlu¹,

Sreekanth²,

Sandhyarani³

et al. 2012

IJBBB

Self Cite

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“…In such circumstances, X-ray diffraction (XRD) line broadening of these materials is due to both crystallite refinement and lattice micro-strains plus instrumental broadening. Accordingly, the grain sizes and lattice micro-strains of the mechanically alloyed powders have been estimated by XRD coupled with direct measurement of grain sizes using transmission electron microscopy (TEM) [24,25]. Although the grain size estimated from XRD can be corroborated by TEM, the determination of the lattice micro-strain often relies on XRD only [21].…”

Section: Introductionmentioning

confidence: 99%

Thermal treatment effect on structural features of mechano-synthesized fluorapatite-titania nanocomposite: A comparative study

Nasiri–Tabrizi

2014

J Adv Ceram

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Abstract:The influence of thermal treatment on the structural features of mechano-synthesized fluorapatite-titania composite nanopowders was studied. A mixture of calcium and phosphate reagents was mixed with a certain amount of titania (20 wt%) and then was mechanically activated for 5 h, 10 h and 15 h respectively. After that, the mechano-synthesized powders were annealed at 700 ℃ for 2 h. The crystallite size of the composite nanopowders estimated from Williamson-Hall method was in good agreement with transmission electron microscopy (TEM) analysis. Scanning electron microscopy (SEM)/TEM images confirmed the formation of a cluster-like composite which was composed of ellipse-like nanoparticles with an average size of about 16±7 nm after 15 h of milling. During the milling process, large variations in mechanochemical behavior of the CaHPO 4 -Ca(OH) 2 -CaF 2 -TiO 2 system were detected. After the beginning of milling, no trace of the composite was found due to the lack of sufficient time for the mechanical activation. When the mechanical activation time increased to 15 h, composite nanopowders with the crystallite size of around 21.66 nm were formed. During heating at 700 ℃, the recovery of crystallinity occurred and the fraction of crystalline phase reached a maximum around 88.79% for the 10-h milled sample. Results indicated that the structural features of the composite were strongly influenced by the subsequent annealing.

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“…According to maximum peak of XRD at 2h = 35.8°, the sizes of nanoparticles calculated by Scherrer formula following as (Venkateswarlu et al 2010):…”

Section: Resultsmentioning

confidence: 99%

Influence of carbon nanotubes support on the morphology of Fe3O4 nanoparticles

et al. 2014

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In this paper, the effects of carbon nanotubes as a support to the morphology and size of Fe 3 O 4 magnetic nanoparticles have been investigated. The synthesis of Fe 3 O 4 /CNTs nanocomposite powder was performed by the direct precipitation method through ferric chloride (II) and (III) at room temperature. The prepared samples were analyzed by X-ray diffraction spectra, Fourier transform infrared spectroscopy, scanning electron microscopy and transmission electron microscopy. The results demonstrated considerable changes in the Fe 3 O 4 nanoparticle size, also the morphology of Fe 3 O 4 /CNTs nanocomposite powder from agglomerative into rode shape.

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X-ray peak broadening studies of nanocrystalline hydroxyapatite by Williamson–Hall analysis

Cited by 394 publications

References 23 publications

X-Ray Peak Profile Analysis of Nanostructured Hydroxyapatite and Fluorapatite

X-Ray Peak Profile Analysis of Nanostructured Hydroxyapatite and Fluorapatite

Thermal treatment effect on structural features of mechano-synthesized fluorapatite-titania nanocomposite: A comparative study

Influence of carbon nanotubes support on the morphology of Fe3O4 nanoparticles

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