The Thermal Conductivity Of Metallic Ceramics

2 3 from 0 c to 2 000 c k increases approximately linearly figure 1.

The thermal conductivity of metallic ceramics.

The thermal conductivity of ceramic materials plays an important role in its application. Heat transfer occurs at a lower rate in materials of low thermal conductivity than in materials of high thermal conductivity. Thermal conductivity k is the quantity of heat transmitted due to an unit temperature gradient in unit time under steady conditions in a direction normal to a surface of the unit area. Ceramics with high or low thermal conductivity can be selected from our materials list.

Their various applications include cutting and grinding tools thermal barrier coatings diffusion resistant thin films interconnects and superconductivity devices. Looking at the values quoted in various handbooks papers and data sheets two things are observed. In each case the ability of the material to resist or permit heat flow is important. Thermal conductivity k is used in the fourier s equation.

Transition metal carbides nitrides and borides can be called metallic ceramics because they are electronically conductive and extremely hard. The thermal conductivity of a material is a measure of its ability to conduct heat it is commonly denoted by or. Aluminum nitride an216a 150. Calculate overall heat transfer coefficient.

Silicon carbide sc1000 200. Measured total thermal conductivity of these metallic ceramics. Information of silicon carbide. The problem with the thermal conductivity of ceramics is the dependence on the composition grain size and manufacturing process which make it rather difficult to obtain a reliable value from literature only.