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锂离子外扩散对扩镁铌酸锂表层结晶特性的影响

阙文修 姚熹

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锂离子外扩散对扩镁铌酸锂表层结晶特性的影响

阙文修, 姚熹

INFLUENCE OF LITHIUM ION OUTDIFFUSION ON THE CRYSTALLINITY OF MAGNESIUM DIFFUSED LITHIUM NIOBATE SURFACE LAYER

QUE WEN-XIU, YAO XI
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  • 利用常规X射线衍射和掠入射X射线衍射对在空气中进行镁离子内扩散的扩镁铌酸锂单晶表层的富氧化镁层特性进行了研究,揭示出镁离子内扩散初期随着体内锂离子的外扩散,首先在富氧化镁层形成Li3Mg2NbO6和Mg4Nb2O9的化合物结构,Li3Mg2NbO6出现在富氧化镁的内表层,而Mg4Nb
    With the conventional X-ray diffraction and grazing-incidence X-ray diffraction. We have investigated the MgO-rich layer characteristics in the magnesium diffused lithium niobate single crystal, when the magnesium-ion indiffusion process in the layer is carried out in atmosphere. It is found that the MgO-rich layer exhibits the crystal structure of Li3Mg2NbO6 and Mg4Nb2O9, when indiffusion time for magnesium-ion is short. these aspects indicate that Li3Mg2NbO6 is in the subsurface layer of MgO-rich layer and Mg4Nb2O9 forms an uniform layer in the MgO-rich layer.When further increasing diffusion time the lithium-ion outdiffusion from the bulk of lithium niobate become prominent and Li3Mg2NbO6 and Mg4Nb2O9 compounds disappear in succession, and LiNb3O8 compound structure appears consequentially. It is observed by scanning electron microscopy that the surface of magnesium diffused lithium niobate indicates a multicrystal structure, the decomposing and disappearing processes of these surface layer compounds are also revealed
    • 基金项目: 西安交通大学精细功能电子材料与器件实验室开放基金资助的课题
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  • 文章访问数:  3353
  • PDF下载量:  497
  • 被引次数: 0
出版历程
  • 收稿日期:  1995-01-23
  • 修回日期:  1995-05-23
  • 刊出日期:  1996-05-20

锂离子外扩散对扩镁铌酸锂表层结晶特性的影响

  • 1. 西安交通大学电子材料研究室,西安710049
    基金项目: 

    西安交通大学精细功能电子材料与器件实验室开放基金资助的课题

摘要: 利用常规X射线衍射和掠入射X射线衍射对在空气中进行镁离子内扩散的扩镁铌酸锂单晶表层的富氧化镁层特性进行了研究,揭示出镁离子内扩散初期随着体内锂离子的外扩散,首先在富氧化镁层形成Li3Mg2NbO6和Mg4Nb2O9的化合物结构,Li3Mg2NbO6出现在富氧化镁的内表层,而Mg4Nb

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