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首页> 外文期刊>Journal of Materials Research >Raman and cathodoluminescence spectroscopies of magnesium-substituted hydroxyapatite powders
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Raman and cathodoluminescence spectroscopies of magnesium-substituted hydroxyapatite powders

机译：镁取代的羟基磷灰石粉末的拉曼光谱和阴极发光光谱

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摘要

Stoichiometric and magnesium-substituted synthetic hydroxyapatite (HA) powders with different Mg contents were characterized by Raman and cathodoluminescence (CL) spectroscopies. The substitution of Ca ions by Mg is presently of great interest because it may improve activity in the first stage of the bone remodeling process. In this paper, we show new evidence that CL spectroscopy has the capability to detect the presence of crystal defects, related to the presence of magnesium substituting calcium in Mg-doped HA powders. The dependence of CL spectra of stoichiometric and magnesium-doped HA powders on their chemical composition was studied, and the results are compared with Raman analysis and data previously collected by other analytical tools. All the investigated powders showed five distinct CL bands; moreover, in magnesium-doped HA, an additional band at higher energy was found. The intensity ratios between selected CL bands showed some relationships with the powder crystallinity and the estimated amount of magnesium both in the HA lattice and in the amorphous surface layer; moreover the band observed only in magnesium-substituted powders could be directly related to the amount of magnesium entered into the HA lattice. Such results can contribute to improve the knowledge of the crystallographic structure of Mg-substituted hydroxyapatite.
机译：用拉曼光谱和阴极荧光光谱（CL）对具有不同Mg含量的化学计量和镁取代的合成羟基磷灰石（HA）粉末进行了表征。 Ca离子被Mg取代目前引起人们极大的兴趣，因为它可以改善骨骼重塑过程第一阶段的活性。在本文中，我们显示出新的证据，表明CL光谱法能够检测晶体缺陷的存在，该缺陷与掺Mg的HA粉中镁替代钙的存在有关。研究了化学计量和镁掺杂的HA粉末的CL光谱对其化学组成的依赖性，并将结果与​​拉曼分析和先前由其他分析工具收集的数据进行了比较。所有研究的粉末均显示五个不同的CL谱带。此外，在掺杂镁的HA中，发现了一个更高能量的附加能带。选定的CL谱带之间的强度比与粉末的结晶度以及HA晶格和非晶态表面层中镁的估计含量之间存在一定的关系。此外，仅在镁取代的粉末中观察到的能带可能与进入HA晶格的镁含量直接相关。这样的结果可以有助于提高对Mg-取代的羟基磷灰石的晶体结构的认识。

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  • 来源
    《Journal of Materials Research》 |2005年第4期|p.1009-1016|共8页
  • 作者

    S. Sprio; G. Pezzotti; G. Celotti;

  • 作者单位

    Institute of Science and Technology for Ceramics-National Research Council, 48018 Faenza (RA), Italy;

  • 收录信息 美国《科学引文索引》(SCI);美国《工程索引》(EI);美国《生物学医学文摘》(MEDLINE);
  • 原文格式 PDF
  • 正文语种 eng
  • 中图分类 工程材料学;
  • 关键词

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