Diffusion Coefficients of Helium in Fused Quartz
Diffusion Coefficients of Helium in Fused Quartz
复制标题
DOI：
10.1063/1.1731562
复制
发表时间：
1961
影响因子：
4.4
通讯作者：
D. E. Swets;R. Lee;R. Frank
中科院分区：
文献类型：
--
作者：
D. E. Swets;R. Lee;R. Frank
使用质谱仪作为检测装置，研究了氦气通过高纯熔融石英空心圆柱体壁的扩散。通过用氦气包围中空圆柱体的外部并观察其扩散进入质谱仪，在24° C至1034°C的温度范围内测量渗透速率和扩散系数。扩散过程似乎是相对简单的，只有很小的偏离菲克定律发生。发现活化能在24°至300°C的温度范围内不同于在300°至1034°C的温度范围内。在低温范围内，扩散系数表示为D=3.04×10− 4 exp（−5580±56 cal/g atomRT）cm 2/sec，在高温范围内，它们表示为D=7.40×10−4 exp（−6613±40 cal/g atomRT）cm 2/sec。溶解度也通过渗透率除以扩散系数来确定。这表示为S=1.99×1017 exp（−−680±60 cal/g atomRT）atoms/cm 3，在温度范围内......
The diffusion of helium through the walls of high‐purity fused quartz hollow cylinders was studied using a mass spectrometer as a detecting device. By surrounding the outside of the hollow cylinder with helium and observing it diffuse through into the mass spectrometer, permeation rates and diffusion coefficients were measured in the temperature range of 24° to 1034°C. The diffusion process appeared to be relatively simple with only small deviations from Fick's laws occurring. The activation energy was found to be different in the temperature range of 24° to 300°C than in the range of 300° to 1034°C. In the low‐temperature range the diffusion coefficients are expressed by D=3.04×10−4exp(−5580±56 cal/g atomRT)cm2/sec, and in the high‐temperature range they are expressed by D=7.40×10−4 exp(−6613±40 cal/g atomRT)cm2/sec. The solubility was also determined by dividing the permeability by the diffusion coefficients. This was expressed by S=1.99×1017 exp(−−680±60 cal/g atomRT)atoms/cm3 in the temperature range ...