conduction band

Conduction band

The electronic energy band of a crystalline solid which is partially occupied by electrons. The electrons in this energy band can increase their energies by going to higher energy levels within the band when an electric field is applied to accelerate them or when the temperature of the crystal is raised. These electrons are called conduction electrons, as distinct from the electrons in filled energy bands, which, as a whole, do not contribute to electrical and thermal conduction. In metallic conductors the conduction electrons correspond to the valence electrons (or a portion of the valence electrons) of the constituent atoms. In semiconductors and insulators at sufficiently low temperatures, the conduction band is empty of electrons. Conduction electrons come from thermal excitation of electrons from a lower energy band or from impurity atoms in the crystal. See Band theory of solids, Electric insulator, Semiconductor, Valence band

conduction band

[kən′dək·shən ‚band] (solid-state physics) An energy band in which electrons can move freely in a solid, producing net transport of charge.

单词	conduction band
释义	conduction band conduction band n. The set of electron orbitals, generally the outermost shells of the atoms in a conductor or semiconductor, in which electrons are free to move and thereby carry an electric current. conduction band n (General Physics) See energy band conduction band Conduction band The electronic energy band of a crystalline solid which is partially occupied by electrons. The electrons in this energy band can increase their energies by going to higher energy levels within the band when an electric field is applied to accelerate them or when the temperature of the crystal is raised. These electrons are called conduction electrons, as distinct from the electrons in filled energy bands, which, as a whole, do not contribute to electrical and thermal conduction. In metallic conductors the conduction electrons correspond to the valence electrons (or a portion of the valence electrons) of the constituent atoms. In semiconductors and insulators at sufficiently low temperatures, the conduction band is empty of electrons. Conduction electrons come from thermal excitation of electrons from a lower energy band or from impurity atoms in the crystal. See Band theory of solids, Electric insulator, Semiconductor, Valence band conduction band [kən′dək·shən ‚band] (solid-state physics) An energy band in which electrons can move freely in a solid, producing net transport of charge. AcronymsSeechessbase
随便看	straws in the wind straws in your hair strawson strawson, peter frederick straws, to catch at/clutch/grasp/cling to straw that breaks the camel's back straw that breaks the donkey's back straw that broke the camel's back straw that broke the donkey's back straw that stirs the drink straw vote straw votes strawwalker strawweight straw wine strawworm strawy straw yellow stray straya stray capacitance stray cat stray current stray current corrosion strayed