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Hydroxyapatite–magnesium titanate composite nanopowders have been developed using a mechanothermal process. Thermal treatment of the milled powders at 700 ℃ resulted in the formation of HAp/MgTiO3–MgO nanocomposite. X-ray diffraction (XRD), scanning electron microscopy (SEM), transmission electron microscopy (TEM), and energy dispersive X-ray spectroscopy (EDX) techniques were utilized to characterize the synthesized powders. The results revealed that the dominant phases after mechanical activation were hydroxyapatite, anatase (TiO2) and periclase (MgO); while after thermal annealing process at 700 ℃, hydroxyapatite along with geikielite (MgTiO3) and periclase (MgO) were the major phases. Based on the XRD analysis, the evaluation of structural features of the samples indicated that the average crystallite sizes of hydroxyapatite after 10 h of milling and subsequent thermal treatment at 700 ℃ were about 21 nm and 34 nm, respectively. Microscopic observations illustrated that the synthesized powders contained large agglomerates which consisted of significantly finer particles with spheroidal morphology. It is concluded that the mechanothermal method can be used to produce hydroxyapatite-based nanocomposite with appropriate structural and morphological features.


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Characterization of mechanothermal-synthesized hydroxyapatite–magnesium titanate composite nanopowders

Show Author's information Abbas FAHAMI*( )Bahman NASIRI-TABRIZI
Materials Engineering Department, Najafabad Branch, Islamic Azad University, Najafabad, Isfahan, Iran

Abstract

Hydroxyapatite–magnesium titanate composite nanopowders have been developed using a mechanothermal process. Thermal treatment of the milled powders at 700 ℃ resulted in the formation of HAp/MgTiO3–MgO nanocomposite. X-ray diffraction (XRD), scanning electron microscopy (SEM), transmission electron microscopy (TEM), and energy dispersive X-ray spectroscopy (EDX) techniques were utilized to characterize the synthesized powders. The results revealed that the dominant phases after mechanical activation were hydroxyapatite, anatase (TiO2) and periclase (MgO); while after thermal annealing process at 700 ℃, hydroxyapatite along with geikielite (MgTiO3) and periclase (MgO) were the major phases. Based on the XRD analysis, the evaluation of structural features of the samples indicated that the average crystallite sizes of hydroxyapatite after 10 h of milling and subsequent thermal treatment at 700 ℃ were about 21 nm and 34 nm, respectively. Microscopic observations illustrated that the synthesized powders contained large agglomerates which consisted of significantly finer particles with spheroidal morphology. It is concluded that the mechanothermal method can be used to produce hydroxyapatite-based nanocomposite with appropriate structural and morphological features.

Keywords:

HAp/MgTiO3–MgO, nanocomposite, characterization methods, mechanothermal
Received: 13 January 2013 Revised: 30 January 2013 Accepted: 31 January 2013 Published: 06 April 2013 Issue date: March 2013
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Publication history

Received: 13 January 2013
Revised: 30 January 2013
Accepted: 31 January 2013
Published: 06 April 2013
Issue date: March 2013

Copyright

© The author(s) 2013

Acknowledgements

The authors are grateful to research affairs of Islamic Azad University, Najafabad Branch, for supporting this research.

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