Comparison of high-voltage ac and pulsed operation of a surface dielectric barrier discharge
Comparison of high-voltage ac and pulsed operation of a surface dielectric barrier discharge
复制标题
DOI：
10.1088/0022-3727/39/20/016
复制
发表时间：
2006-10
期刊：
影响因子：
--
通讯作者：
J. Williamson;D. D. Trump-D.;P. Bletzinger;B. Ganguly
中科院分区：
文献类型：
--
作者：
J. Williamson;D. D. Trump-D.;P. Bletzinger;B. Ganguly
在常压空气中，表面介质阻挡放电可以用低频(0.3~2 kHz)高压交流激励，也可以用重复频率为5 0~6 0 0个脉冲的短高压脉冲S−1激发。短脉冲激励放电更分散，没有交流激励放电中明显的多个阴极亮点。计算了两种激励方式下的放电电压、电流和平均功率。作为等离子体化学效率的衡量标准，臭氧数密度是通过紫外线吸收作为平均沉积功率的函数来测量的。交流激发产生的臭氧密度没有短脉冲激发产生的臭氧密度随平均功率的增加而迅速增加，在25W时最大测量密度为∼3×1015 cm−3。在20W时，短脉冲激发产生的最大臭氧密度为∼8.5×1015 cm−3，是相同功率水平下交流激发产生的臭氧密度的4倍。
A surface dielectric barrier discharge (DBD) in atmospheric pressure air was excited either by low frequency (0.3–2 kHz) high-voltage ac or by short, high-voltage pulses at repetition rates from 50 to 600 pulses s−1. The short-pulse excited discharge was more diffuse and did not have the pronounced bright multiple cathode spots observed in the ac excited discharge. The discharge voltage, current and average power deposited into the discharge were calculated for both types of excitation. As a measure of plasma-chemical efficiency, the ozone number density was measured by UV absorption as a function of average deposited power. The density of ozone produced by ac excitation did not increase so rapidly as that produced by short-pulse excitation as a function of average power, with a maximum measured density of ∼3 × 1015 cm−3 at 25 W. The maximum ozone production achieved by short-pulse excitation was ∼8.5 × 1015 cm−3 at 20 W, which was four times greater than that achieved by ac excitation at the same power level.