真空中某些非晶体材料出气的扩散理论

真空中材料出气过程曾有Dayton,Schram,Jaeckel分别给出过理论假设和模型,这些理论仍为当前研究出气过程的基本依据。但是人们早已发现,当测量非晶体材料,例如:塑料、橡胶等的出气过程时,实验与理论之间仍然有矛盾。1964年我们曾提出了“双重叠加扩散”和“非均匀浓度扩散”两个理论模型,能够解释实验结果中的各种现象。在测量出气速率的工作中,我们还对实验方法做了改进。 关键词：

THE DIFFUSION THEORY OF OUTGASSING OF SOME NON-CRYSTAL MATERIALS IN VACUUM

In the early works of Dayton, Schram and Jaeckel, the hypothesis or the model of theory on the outgassing process of material in the Vacuum was given. So far, these conclusions have been accepted as the base for research on outgassing process.But it has already been found that the experimental results of outgassing rates of some non-crystal-line materials (for example, rubber, plastics etc.) are not in agreement with the above mentioned theories. In 1964, we suggested two theoretical models, i.e., "twofold over lapping diffusion" and "non-uniform concentration diffusion". We found that all the abnormal phenomena observed in the experiments can be thoroughly explained by these diffusion mechanisms.We have improved the method of experiment in outgassing rate measurement.