Zielniok D, Eckert H, Cramer C
Fachbereich Chemie der Philipps-Universität Marburg, Hans-Meerwein-Strasse, 35043 Marburg, Germany.
Phys Rev Lett. 2008 Jan 25;100(3):035901. doi: 10.1103/PhysRevLett.100.035901. Epub 2008 Jan 22.
We present temperature-dependent conductivity spectra of sodium borophosphate glasses with a varying borate/phosphate ratio but a constant sodium oxide content which can be mapped into time-dependent mean square displacements. For the first time, we show that characteristic lengths of ion transport derived thereof are directly linked to features of network structure, viz., the number of boron oxide tetrahedra. Our results also shed light on the mixed network former effect.
我们展示了硼磷酸钠玻璃的温度依赖性电导率谱，其硼酸盐/磷酸盐比例不同，但氧化钠含量恒定，这些谱可以映射到随时间变化的均方位移上。我们首次表明，由此得出的离子传输特征长度与网络结构特征，即氧化硼四面体的数量直接相关。我们的结果还揭示了混合网络形成体效应。
