Chemical and Thermal Stability of Multiple Ions Doped Non-Stoichiometric Nanoapatite Heat-Treated in CO2 and Air Atmospheres

K. Jamuna Thevi; Mohammed Rafiq Abdul Kadir; Hendra Hermawan

doi:10.4028/www.scientific.net/AMR.925.77

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HomeAdvanced Materials ResearchAdvanced Materials Research Vol. 925Chemical and Thermal Stability of Multiple Ions...

Chemical and Thermal Stability of Multiple Ions Doped Non-Stoichiometric Nanoapatite Heat-Treated in CO₂ and Air Atmospheres

Abstract:

Nanostructured apatite has been widely used as a bone substitute material due to its close resemblance to human bone mineral. To further mimic biological apatites, multiple ions doped non-stoichiometric nanoapatite has been studied. A nanosized apatite (NAp-2) containing Mg (1.09 wt%), Na (0.15 wt%), K (0.008 wt%) and CO₃^2- (5.18 wt%) was synthesized by a wet precipitation technique. The presence of these ions in NAp-2 was detected using ICP. Broad diffraction peaks of XRD results indicated the presence of nanocrystalline phase pure NAp-2. The primary particle size of the resulted powder was ~ 20 nm, typical of bone crystal size, estimated using Scherrers equation. Based on CHN results, the NAp-2 powders showed a total loss of 51 and 78% of carbonate ions when heat-treated at 900°C in both CO₂ and air atmospheres, respectively. This indicates that the heat-treatment in CO₂ flux has reduced the carbonate ions lost from the NAp-2. A highly crystalline HA phase was formed in the ionic doped NAp-2 without secondary phases, indicating a thermal stability of this powder at 900°C in CO₂ and air atmospheres. Thus, this study demonstrated that a phase pure multiple ions doped nanoapatite was synthesized using a wet precipitation technique.

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Periodical:

Advanced Materials Research (Volume 925)

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77-81

DOI:

https://doi.org/10.4028/www.scientific.net/AMR.925.77

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Online since:

April 2014

Authors:

K. Jamuna Thevi*, Mohammed Rafiq Abdul Kadir, Hendra Hermawan

Keywords:

Chemical Stability, Nanoapatite, Thermal Stability

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