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首页> 外文期刊>International Journal of Refrigeration >Several motivations, improved procedures, and different contexts: The first liquefactions of helium around the world
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Several motivations, improved procedures, and different contexts: The first liquefactions of helium around the world

机译：几种动机，改进的程序以及不同的环境：氦在全球范围内首次液化

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摘要

Helium was the last member of the list of the so-called permanent gases to be liquefied. The main reasons for that were the very late discovery of the element on the earth's surface and its boiling point, the lowest of all substances. This account of the earliest and different methods for its liquefaction reveals, both chronologically and geographically, the technical developments involved. An effort is made to show how the availability of the natural resource, together with political circumstances and economic limitations, had different roles in specific moments of the entire history.
机译：氦气是要液化的所谓永久性气体清单中的最后一个。其主要原因是在地球表面发现该元素的最晚时间及其沸点，是所有物质中最低的。最早和不同的液化方法的说明从时间和地理上揭示了所涉及的技术发展。努力表明自然资源的可利用性以及政治环境和经济限制在整个历史的特定时刻如何发挥不同的作用。

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