Conduction of Heat in Solids H. S. Carslaw, J. C. Jaeger
Publisher: Oxford University Press, USA

Allen, Astrophysical Quantities; H. Carslaw, Introduction to the Mathematical Theory of the Conduction of Heat in Solids; P. However, there is one important difference between metals and non-metals: metals contain Now, here comes the question: if molecular vibration is common to both metals and non-metals, shouldn't we expect both of them to exhibit similar heat conductivity? Conduction: Heat is disorderly kinetic energy of molecules and/or vibration of molecules depending on if the matter is solid liquid or gas. When the heat transfer involves solids then we call it conduction. Well, in fact there are two mechanisms of heat conduction. All solids (metals and non-metals) are made up of tiny particles called atoms, or groups of atoms called molecules. For conduction to work there needs to be physical contact between the two systems in question. For example, metals are better conductor than wood or plastic. Their best method is conduction. Heat Conduction takes place in solids, liquids, and gases, but works best in materials that have simple molecules that are located close to each other. Heat can be transferred from one place to another by three methods: conduction in solids, convection of fluids (liquids or gases), and radiation through anything that will allow radiation to pass. More energetic molecules in a hot substance collide with less energetic molecules in a colder substance, transferring energy and therefore heat. In solids, this transfer is called conduction. Of Semiconductor Devices; Charles Kittel, Introduction to Solid State Physics; C. From this conduction, including gravity, convection is formed.