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首页> 外文期刊>Journal of Materials Engineering and Performance >Influence of Magnesium Ion Substitution on Structural and Thermal Behavior of Nanodimensional Hydroxyapatite
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Influence of Magnesium Ion Substitution on Structural and Thermal Behavior of Nanodimensional Hydroxyapatite

机译：镁离子取代对纳米羟基磷灰石结构和热行为的影响

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摘要

Hydroxyapatite (HA), incorporating small amount of magnesium, shows attractive biological performance in terms of improved bone metabolism, osteoblast and osteoclast activity, and bone in-growth. This article reports a systematic investigation on the influence of magnesium (Mg) substitution on structural and thermal behavior of nanodimensional HA. HA and Mg-substituted HA nanopowders were synthesized through sol-gel route. The morphology and size of nanopowders were characterized by transmission electron microscopy. The BET surface area was evaluated from N_2 adsorption isotherms. Structural analysis and thermal behavior were investigated by means of Fourier transform infrared spectroscopy, x-ray diffraction, thermogravimetry, and differential thermal analysis. As-synthesized powders consisted of flake-like agglomerates of HA and calcium-deficient HA. The incorporation of magnesium in HA resulted in decrease of crystallite size, crystallinity, and lattice parameters a and c and increase in BET surface area. β-tricalcium phosphate formation occured at lower calcination temperature in Mg-substituted HA than HA.
机译：掺入少量镁的羟基磷灰石（HA）在改善骨骼代谢，成骨细胞和破骨细胞活性以及骨骼向内生长方面表现出有吸引力的生物学性能。本文报告了有关镁（Mg）替代对纳米HA的结构和热行为的影响的系统研究。 HA和Mg取代的HA纳米粉通过溶胶-凝胶法合成。纳米粉末的形貌和尺寸通过透射电子显微镜表征。由N_2吸附等温线评估BET表面积。通过傅里叶变换红外光谱，X射线衍射，热重分析和差热分析研究了结构分析和热行为。合成后的粉末由HA和钙缺乏型HA的片状附聚物组成。镁在HA中的掺入导致微晶尺寸，结晶度和晶格参数a和c减小，BET表面积增加。在Mg取代的HA中，β-磷酸三钙的形成发生在比HA低的煅烧温度下。

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