Local Structure of Rare-earth Ions in Alkali Silicate Glasses Studied by Extended X-Ray Absorption Fine Structure
Local Structure of Rare-earth Ions in Alkali Silicate Glasses Studied by Extended X-Ray Absorption Fine Structure
复制标题
扩展X射线吸收精细结构研究碱硅酸盐玻璃中稀土离子的局域结构
DOI：
10.7567/jjaps.38s1.168
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发表时间：
1999
期刊：
影响因子：
--
通讯作者：
H. Takebe
中科院分区：
文献类型：
--
作者：
H. Yamaguchi;H. Takebe
用扩展X射线吸收精细结构（EXAFS）研究了碱硅酸盐玻璃中钕、铒离子的局域结构。最近邻氧离子的配位数和原子间距离随改性剂碱金属种类的变化而变化。结果表明，这些结构参数作为碱金属离子的场强的函数而变化。发现碱金属离子位于稀土离子的第二最近的位置。在掺铒的钾硅酸盐玻璃中，铒-钾距离被确定为3.78 μ m，这与通过Cordegan等人的分子动力学模拟计算的值一致[J. Non-Cryst. Solids 152（1993）225]。
Local structure of neodymium and erbium ions in alkali silicate glasses has been investigated by extended X-ray absorption fine structure (EXAFS). The coordination number and interatomic distance for the nearest neighbor oxygen ions change with the modifier alkali metal species. It is shown that these structural parameters vary as a function of the field strength of the alkali metal ions. The alkali metal ions are found to locate at the second nearest site of the rare-earth ions. In an erbium-doped potassium silicate glass, the erbium-potassium distance is determined to be 3.78 Å, which agrees with the calculated value by a molecular dynamics simulation of Cormier et al. [J. Non-Cryst. Solids 152 (1993) 225].