NDLI: The role of ammonium citrate washing on the characteristics of mechanochemical–hydrothermal derived magnesium-containing apatites

Content Provider	Springer Nature Link
Author	Chen, Chun Wei Suchanek, Wojciech L. Shuk, Pavel Byrappa, Kullaiah Oakes, Charles Riman, Richard E. Brown, Kelly TenHuisen, Kevor S. Janas, Victor F.
Copyright Year	2007
Abstract	The role of citrate washing on the physical and chemical characteristics of magnesium-substituted apatites (HAMgs) was performed. HAMgs were synthesized by a mechanochemical–hydrothermal route at room temperature in as little as 1 h, which is five times faster than our previous work. Magnesium-substituted apatites had concentrations as high as 17.6 wt% Mg with a corresponding specific surface area (SSA) of 216 m$^{2}$/g. A systematic study was performed to examine the influence of increasing magnesium content on the physical and chemical characteristics of the reaction products. As the magnesium content increased from 0 to 17.6 wt%, magnesium-doped apatite crystallite size decreased from 12 to 8.8 nm. The Mg/(Mg + Ca) ratio in the product was enriched relative to that used for the reacting precursor solution. During mechanochemical–hydrothermal reaction, magnesium doped apatites co-crystallize with magnesium hydroxide. Citrate washing serves to remove the magnesium hydroxide phase. The concomitant increase in surface area results because of the removal of this phase. Possible mechanisms for magnesium hydroxide leaching are discussed to explain the measured trends.
Starting Page	1413
Ending Page	1421
Page Count	9
File Format	PDF
ISSN	09574530
Journal	Journal of Materials Science: Materials in Medicine
Volume Number	18
Issue Number	7
e-ISSN	15734838
Language	English
Publisher	Kluwer Academic Publishers-Plenum Publishers
Publisher Date	2007-02-06
Publisher Place	New York
Access Restriction	Subscribed
Subject Keyword	Surfaces and Interfaces, Thin Films Ceramics, Glass, Composites, Natural Methods Metallic Materials Polymer Sciences Characterization and Evaluation of Materials Biomaterials
Content Type	Text
Resource Type	Article
Subject	Biomaterials Biophysics Bioengineering Biomedical Engineering

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