The thermal conductivity of metal is measured by thermal conductivity. Thermal conductivity indicates the thermal conductivity of a substance. The greater the thermal conductivity, the lower the thermal resistance and the higher the thermal conductivity. Among metallic materials, silver has the highest thermal conductivity, but the cost is higher, followed by pure copper, but it is not easy to process.
Principle of metal heat conduction
The heat conduction of metal conductor is mainly through the movement of electrons, while the heat conduction of insulator mainly depends on the conduction of lattice waves, that is, the movement of phonons. For semiconductors, the thermal conductivity is determined by the above two mechanisms because of their high resistance and the nature between conductor and insulator. Generally speaking, phonons contribute more to thermal conductivity than electrons.
The heat conduction of metal crystal is due to the collision of free electrons with metal cations in the crystal, and another metal atom loses its outermost electrons and collides with the third (adjective) metal cation to become a neutral atom.
If the right end is heated, the neutral atom at the right end loses electrons and transfers energy to the metal atom on the left, to the metal cation on the left, and then loses electrons when heated, and then to the left end, so that heat is conducted from the right end to the left end.