Explanation
A physical quantity that characterizes the heat conduction velocity of an object. When there is a temperature gradient. Heat conduction occurs, and in a one-dimensional stable state, the amount of heat per unit area passing through a unit time perpendicular to the direction of heat conduction is directly proportional to the temperature gradient. The carriers of heat conduction in solids are electrons, phonon, magnetic excitations and in some cases! Electromagnetic radiation under certain conditions. The total thermal conductivity of the same body is composed of the contributions of various heat conduction carriers.
Classification
Fundamental of Material Science -> Performance basis of materials