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As Slush is referred to a slurry-like mixture of a solid and a liquid phase of the same substance. The word comes from the English slushed ice , which means something like "mud ice" (slush = silt).


In geomorphology , the term “slush” is used to denote “mobile”, water-saturated snow in the periglacial areas determined by permafrost . Thawed by the sun and possibly saturated by rain, slushes can appear both continuously flowing and suddenly slide off.


The term is also applied to gases that have been partially liquefied and partially solidified by cooling to their melting point , since the resulting mixture of liquid and solid phase has a mushy, muddy consistency.

Nitrogen , which is cooled to about −210 ° C, forms nitrogen slush . This can be used for shock-freezing objects, for example in preparation for electron microscopy .


Hydrogen , which when cooled to −259 ° C changes into a sludge-like state - slush hydrogen - was seen in space travel as a means of increasing the energy density of liquid hydrogen. Due to major handling difficulties caused by the negative pressure (70 mbar absolute), however, it was largely abandoned.

Individual evidence

  1. Super fuel of the future. Deutschlandfunk, November 18, 2004, accessed January 5, 2009 .
  2. ^ Hydrogen from A to Z. (No longer available online.) German Hydrogen and Fuel Cell Association, November 18, 2004, formerly the original on March 28, 2009 ; accessed on August 21, 2020 .  ( Page no longer available , search in web archivesInfo: The link was automatically marked as defective. Please check the link according to the instructions and then remove this notice.@1@ 2Template: Dead Link /