Breakdown mechanism of CF4 and N2 binary gas in refrigeration temperature range

The mechanism of gas discharge in refrigeration temperature range is still not clear. N 2 , CF 4 , 20% CF 4 +N 2 and 50%CF 4 +50%N 2 binary gas mixtures were tested under the conditions of–153–25 °C and 50–2000 Pa. The experimental results show that the minimum of Paschen curves of all test samples...

Full description

Saved in:
Bibliographic Details
Published in:Journal of Central South University 2018-07, Vol.25 (7), p.1701-1707
Main Authors: Li, Wei-guo, Hou, Meng-xi, Yuan, Chuang-ye, Cheng, Yu-di, Tu, You-ping
Format: Article
Language:English
Subjects:
Engineering
Gas mixtures
Low pressure
Metallic Materials
Refrigeration
Variations
Citations: Items that this one cites
Items that cite this one
Online Access:Get full text
Tags: Add Tag
No Tags, Be the first to tag this record!
Description
Summary:The mechanism of gas discharge in refrigeration temperature range is still not clear. N 2 , CF 4 , 20% CF 4 +N 2 and 50%CF 4 +50%N 2 binary gas mixtures were tested under the conditions of–153–25 °C and 50–2000 Pa. The experimental results show that the minimum of Paschen curves of all test samples shifts to low pressure, from 500 Pa to 200 Pa. The value of Paschen curve minimum of N 2 shows remarkable fluctuation. This fluctuation is explained by molecule agglomeration and electronic mean energy. The fluctuation decreases with the increasing mixing ratio of CF 4 . What’s more, the value of Paschen curve minimum of CF 4 decreases with temperature. This phenomenon is ascribed to attach-radiation and secondary process.
ISSN:2095-2899
2227-5223
DOI:10.1007/s11771-018-3861-1