Heat Conducting Ceramics

Ceramics are increasingly used in packages and printed circuit boards because they have a number of advantages over plastics.

Heat conducting ceramics.

When looking for materials that offer high thermal conductivity and electrical insulation ceramics are the natural choice. In addition to the well known physical properties of ceramic materials hardness compressive strength brittleness there is the property of electric resistivity most ceramics resist the flow of electric current and for this reason ceramic materials such as. Thermal ceramics manufactures and installs a wide range of thermal insulation products such as cerablanket kaowool low biopersistent superwool and porextherm microporous products. Thermal conduction is generated by the movement of electrons and the transfer of lattice vibrations.

Metals with low electrical resistance and crystals in which lattice vibrations are transferred easily for example crystals with atoms or ions of similar masses at lattice points and covalent crystals with. Thermal conductivity of fine ceramics. Unfortunately the cost of ceramics is. Much higher thermal conductivity possible match of the coefficient of thermal expansion and hermetic sealing.

The thermal grease 860 is a silicone oil with a zinc oxide filler and 8616 and 8617 are synthetic oils with various fillers including aluminum oxide and boron nitride. Thermal conductivity is a material property that describes ability to conduct heat thermal conductivity can be defined as the quantity of heat transmitted through a unit thickness of a material in a direction normal to a surface of unit area due to a unit temperature gradient under steady state conditions. These materials can be separated into two groups electrical insulators and electrical conductors. The thermal conductivity of ceramic materials plays an important role in its application.

Thermally conductive electrical insulators. Conductive ceramics advanced industrial materials that owing to modifications in their structure serve as electrical conductors. The american ceramic society 550 polaris pkwy ste 510 westerville oh 43082. These thermal greases have low electrical conductivity and their volume resistivities are 1 5 10 15 1 8 10 11 and 9 9 10 9 ω cm for 860 8616 and 8617 respectively.

The thermal conductivity of a material is a measure of its ability to conduct heat it is commonly denoted by or. Heat transfer occurs at a lower rate in materials of low thermal conductivity than in materials of high thermal conductivity.