Gap Size Dependence of the Dielectric Strength in Nano Vacuum Gaps
Gap Size Dependence of the Dielectric Strength in Nano Vacuum Gaps
复制标题
DOI：
10.1109/tdei.2013.6571470
复制
发表时间：
2013-08-01
影响因子：
3.1
通讯作者：
Hubler, Alfred
中科院分区：
文献类型：
--
作者：
Lyon, David;Hubler, Alfred
我们研究了100 nm以下的真空间隙的介电强度。我们发现，它们的介电强度有一个幂律依赖于差距的大小。我们应用该幂律发现，两个钨电极之间的10 nm的真空间隙的介电强度为6.5 V/nm。介电强度可用于计算最大能量密度、电荷密度和功率密度。对于钨，最大体积能量密度为190 MJ/m（3）。纳米真空间隙可以在10纳秒内放电，最大重力功率密度为10（12）W/kg。虽然外部放电时间是几纳秒，但自放电时间可以是几小时或几天。尺寸为d的真空间隙的比电容为C = ε（0）/d（2）。如果d = 10 nm，则C = 8.85x10（4）F/m（3）。
We study the dielectric strength of vacuum gaps of under 100 nm. We find their dielectric strengths to have a power law dependence on the gap size. We apply this power law to find that the dielectric strength of a vacuum gap of 10 nm between two tungsten electrodes is 6.5 V/nm. The dielectric strength can be used to compute the maximum energy density, charge density, and power density. For tungsten, the maximum volumetric energy density is 190 MJ/m(3). Nano vacuum gaps can discharge in 10 nanoseconds, giving a maximum gravitometric power density of 10(12) W/kg. While the external discharge time is a few nanoseconds, the self-discharge time can be hours or days. The specific capacitance of a vacuum gap of size d is C = epsilon(0)/d(2). If d = 10nm then C = 8.85x10(4) F/m(3).