共查询到20条相似文献,搜索用时 15 毫秒
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Andreas Kobus 《真空研究与实践》2000,12(2):99-102
The accurate design of condensers in the vacuum technology with the help of 'real' flash calculation is possible due to the easy access to calculation programs and databases. The article shows with a simple example, how important the knowledge of the real condensation‐behaviour can be, when designing a modern, effluent reduced vacuum system. In addition, design failures on vacuum condensers can cause trouble in the performance of vacuum pumps. 相似文献
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Moutusi Banerjee Abhisek Gupta Shyamal K. Saha Dipankar Chakravorty 《Small (Weinheim an der Bergstrasse, Germany)》2015,11(28):3451-3457
Attachment of Li+ ion on graphene surface to realize Li+‐ion conductor is a real challenge because of the weak interaction between the ions and the functional groups of graphene oxide; although, a large number of theoretical results are already available in the literature. To overcome this problem, graphene oxide is functionalized by 1‐aza‐15‐crown‐5, the cage‐like structure containing four oxygens that can bind Li+ ion through electrostatic interaction. Li+ migration on graphene surface has been investigated using ac relaxation mechanism. Perfect Debye‐type relaxation behavior with β (relaxation exponent) value ≈1 resulting from single ion is observed. The activation energy of Li+ migration arising due to cation‐π interaction is found to be 0.37 eV, which agrees well with recently reported theoretical value. It is believed that this study will help to design isolated ion conductors for Li+‐ion battery. 相似文献
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