摘要
本文介绍了材料放气的理论和模型,同时运用费克定理推导出圆柱型测试产品的理论放气率,并介绍了测量放气率的两种常用方法:定容法和小孔流导法。文中指出了运用小孔流导法存在的三个问题,并通过双规流导(TGT)法解决了此类问题。
This paper discusses the theory and models of materials outgassing. Theoretical outgassing rates of typical (cylindrical) testing products are obtained by using Fick’s law. Two methods of measuring the outgassing rate are proposed, which are the constant volume method and the orifice throughput method. Three problems of the orifice throughput method are analyzed and solved by the twin gauge throughput (TGT) method.
出处
《航天器环境工程》
2010年第6期735-738,共4页
Spacecraft Environment Engineering
基金
航天科技基金资助项目
关键词
超高真空
放气
定容法
小孔流导法
双规流导法
ultra-high vacuum
outgassing
constant volume method
orifice throughput method
TGT method
