| 单词 | supercooling |
| 释义 | supercooling 1 The cooling of a liquid to below its freezing point without a change from the liquid to solid state taking place. In this metastable state the particles of the liquid lose energy but do not fall into place in the lattice of the solid crystal. If the liquid is seeded with a small crystal, crystallization usually takes place and the temperature returns to the freezing point. This is a common occurrence in the atmosphere where water droplets frequently remain unfrozen at temperatures well below 0°C until disturbed, following which they rapidly freeze. The supercooled droplets, for example, rapidly freeze on passing aircraft forming ‘icing’, which can be a hazard. 2 The analogous cooling of a vapour to make it supersaturated until a disturbance causes condensation to occur, as in the Wilson cloud chamber. |
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