High electric field conduction in low-alkali boroaluminosilicate glass
High electric field conduction in low-alkali boroaluminosilicate glass
复制标题
低碱硼铝硅酸盐玻璃的高电场传导
DOI：
--
复制
发表时间：
2015
期刊：
影响因子：
--
通讯作者：
M. Lanagan
中科院分区：
文献类型：
--
作者：
D. Choi;C. Randall;E. Furman;M. Lanagan
了解低碱硼铝硅酸盐玻璃中的电子和离子传输非常重要，低碱硼铝硅酸盐玻璃是高能量密度电容器的一种有前景的电介质。研究了低碱硼铝硅酸盐 (Schott AF 45) 漏电流的电场、厚度和温度依赖性，以阐明高电场下的潜在传导机制。体积电导率范围为室温下的 10−16 S/m 至 200 °C 下的 10−12 S/m。研究还发现，传导随着电场的增加而显着增加，并且单一传导机制不能充分描述宽电场和温度范围内的漏电流数据。从这里应用的系统分析我们得出结论，传导是由多种传导机制的组合控制的。这表明钠离子迁移引起的离子跳跃传导主导了初始阶段的传导，随后是来自电场增强的钠离子耗尽区域的空间电荷限制传导。
It is important to understand electronic and ionic transport in low-alkali boroaluminosilicate glass, which is a promising dielectric for high energy density capacitors. Electric field, thickness, and temperature dependence of the leakage currents for low-alkali boroaluminosilicate (Schott AF 45) were all investigated to elucidate potential conduction mechanisms under high electric field. The bulk conductivity ranged from 10−16 S/m at room temperature to 10−12 S/m at 200 °C. It was also found that conduction significantly increased with electric field and that a single conduction mechanism does not adequately describe leakage current data over wide electric field and temperature ranges. From the systematic analysis applied here we conclude that the conduction was governed by a combination of multiple conduction mechanisms. It is suggested that ion hopping conduction by the sodium ion migration dominated the conduction at the initial stage followed by space-charge-limited conduction from sodium ion depleted regions where electric field is enhanced.