Dynamics of Ag + ions in binary tellurite glasses
Dynamics of Ag + ions in binary tellurite glasses
复制标题
二元亚碲酸盐玻璃中银离子的动力学
DOI：
10.1103/physrevb.72.024201
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发表时间：
2005
影响因子：
3.7
通讯作者：
A. Ghosh
中科院分区：
文献类型：
--
作者：
D. Dutta;A. Ghosh
本文报道了不同组成的xAg 2 O-（1-x）TeO 2导电玻璃在宽温度和频率范围内的离子弛豫。我们已经解释了这些玻璃的电导率和活化能的组成依赖性的组成依赖性的网络结构。我们比较了银碲酸盐玻璃与碱金属（Li，Na）碲酸盐玻璃的结果，并观察到Ag +离子在玻璃中的迁移，一般来说，似乎是异常的。我们已经分析了频率依赖的电气数据的幂律电导率形式主义的框架。我们用碲酸盐网络结构的变化解释了弛豫时间随Ag 2 O含量增加而减小的趋势。有趣的是，我们已经观察到，移动的Ag离子的浓度小于总Ag离子的浓度，并且随着组合物中银氧化物含量的增加而降低，而电导率增加。我们已经表明，电导率谱的标度是独立的温度，但取决于组成。
We have reported the ionic relaxation for different compositions of xAg 2 O-(1-x)TeO 2 conducting glasses in wide temperature and frequency ranges. We have explained the composition dependence of the conductivity and the activation energy in terms of composition-dependent network structure of these glasses. We have compared the results for silver tellurite glasses with those for the alkali (Li,Na) tellurite glasses and observed that the migration of Ag + ions in glasses, in general, appears to be anomalous. We have analyzed the frequency-dependent electrical data in the framework of the power-law conductivity formalism. We have explained the decreasing trend of the relaxation time with increasing Ag 2 O content in terms of structural transformation of tellurite network. Interestingly, we have observed that the concentration of mobile Ag ions is less than the concentration of total Ag ions and decreases with the increase of silver oxide content in the compositions, while the conductivity increases. We have shown that the scaling of the conductivity spectra is independent of temperature, but depends on composition.