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首页> 外文期刊>Journal of Advanced Ceramics >Characterization of mechanothermal-synthesized hydroxyapatite-magnesium titanate composite nanopowders
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Characterization of mechanothermal-synthesized hydroxyapatite-magnesium titanate composite nanopowders

机译：机械热合成羟基磷灰石-钛酸镁复合纳米粉的表征

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Hydroxyapatite-magnesium titanate composite nanopowders have been developed using a mechanothermal process. Thermal treatment of the milled powders at 700 °C 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 °C, 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 °C 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.
机译：羟基磷灰石-钛酸镁复合纳米粉已使用机械热法开发。研磨后的粉末在700°C下进行热处理导致形成HAp / MgTiO3-MgO纳米复合材料。利用X射线衍射（XRD），扫描电子显微镜（SEM），透射电子显微镜（TEM）和能量色散X射线光谱（EDX）技术来表征合成粉末。结果表明，机械活化后的主要相为羟基磷灰石，锐钛矿（TiO2）和周长石（MgO）。而在700°C的热退火过程之后，羟基磷灰石与Geikielite（MgTiO3）和长石（MgO）一起成为主要相。基于XRD分析，样品结构特征的评估表明，在研磨10小时和随后在700℃下热处理后，羟基磷灰石的平均微晶尺寸分别为约21nm和34nm。显微镜观察表明，合成粉末含有大的团块，团块由明显更细的球状颗粒组成。结论是机械热法可用于生产具有适当的结构和形态特征的羟基磷灰石基纳米复合材料。

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