| 单词 | semimetal |
| 释义 | semimetal noun[C] chemistryspecializeduk/ˈsemiːˌmetəl/us/ˈsemiːˌmetəl/(alsometalloid)achemicalelementwith some of thepropertiesof ametaland some of anon-metal, forexamplesiliconandarsenic 半金属Chemical elements
Examplesofsemimetalsemimetal Metalloids are sometimes called semimetals, a practice that has been discouraged as the term "semimetal" has a different meaning in physics than in chemistry. From Wikipedia  This example is from Wikipedia and may be reused under a CC BY-SA license.Physically, they are shiny, brittle solids with intermediate to relatively good electrical conductivity and the electronic band structure of asemimetalor semiconductor. From Wikipedia This example is from Wikipedia and may be reused under a CC BY-SA license.In physics, asemimetalis an element or a compound in which the valence band marginally (rather than substantially) overlaps the conduction band. From Wikipedia This example is from Wikipedia and may be reused under a CC BY-SA license.Like a metal, the conductivity of graphite in the direction of its planes decreases as the temperature is raised; it has the electronic band structure of asemimetal. From Wikipedia This example is from Wikipedia and may be reused under a CC BY-SA license.With nanowire arrays, it is possible to exploitsemimetal-semiconductor transition due to the quantum confinement and use materials that normally would not be good thermoelectric materials in bulk form. From Wikipedia This example is from Wikipedia and may be reused under a CC BY-SA license.These examples are from corpora and from sources on the web. Any opinions in the examples do not represent the opinion of the Cambridge Dictionary editors or of Cambridge University Press or its licensors. |
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