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首页> 外文期刊>Journal of Non-Crystalline Solids: A Journal Devoted to Oxide, Halide, Chalcogenide and Metallic Glasses, Amorphous Semiconductors, Non-Crystalline Films, Glass-Ceramics and Glassy Composites >Electronic conductivity in zinc iron phosphate glasses
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Electronic conductivity in zinc iron phosphate glasses

机译：磷酸锌铁玻璃的电子电导率

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The electrical properties of (40-x)ZnO-xFe(2)O(3)-60P(2)O(5) (x = 10, 20, 30 mol%) glasses were measured by impedance spectroscopy in the frequency from 0.01 Hz to 4 MHz and the temperature range from 303 to 473 K. It was shown that the dc conductivity strongly depends on the Fe2O3 content and Fe(II)/Fe-tot ratio. The increase in dc conductivity for these glasses is attributed to the increase in Fe2O3 content from 10 to 30 mol%. With increasing Fe(II) ion content from 6% to 17% the dc conductivity increases. This indicated that the conductivity arises mainly from polaron hopping between Fe(II) and Fe(III) ions suggesting an electron conduction in these glasses. By applying scaling on conductivity data measured at different temperatures, single master curve was obtained for each glass. On the other hand, deviation from the master curve at high frequencies was observed for glasses with different compositions. This deviation originates from a various mobility of charge carriers in different glass structures. Raman spectra showed the change of structure, from metaphosphate to pyrophosphate, with increasing Fe2O3 content from 10 to 30 mol%. (c) 2007 Elsevier B.V. All rights reserved.
机译：（40-x）ZnO-xFe（2）O（3）-60P（2）O（5）（x = 10、20、30 mol％）玻璃的电学性能通过阻抗谱在0.01的频率下进行测量Hz至4 MHz，温度范围为303至473K。结果表明，直流电导率很大程度上取决于Fe2O3含量和Fe（II）/ Fe-tot比。这些玻璃的直流电导率的增加归因于Fe2O3含量从10摩尔％增加到30摩尔％。随着Fe（II）离子含量从6％增加到17％，直流电导率增加。这表明电导率主要来自Fe（II）和Fe（III）离子之间的极化子跳跃，表明这些玻璃具有电子传导性。通过对在不同温度下测得的电导率数据进行换算，可以获得每种玻璃的单一主曲线。另一方面，对于具有不同组成的玻璃，在高频下观察到与主曲线的偏离。该偏差源自不同玻璃结构中电荷载流子的各种迁移率。拉曼光谱表明，随着Fe2O3含量从10 mol％增加到30 mol％，结构从偏磷酸盐变为焦磷酸盐。 （c）2007 Elsevier B.V.保留所有权利。

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