Thermal Conductivity Of Ceramics Table

The thermal conductivity of a material is a measure of its ability to conduct heat it is commonly denoted by or.

Thermal conductivity of ceramics table.

In summary the published thermal conductivity values of ceramics are ideally suited to match experimental results to numerical simulations and i am afraid that this is exactly what. Aluminum nitride has a very high thermal conductivity while being an electrical insulator. Hexagonal boron nitride is a chalky white material and is often called white graphite it has generally poor mechanical properties. Among them silicon nitride ceramic seems the most frequently used in the power electronic applications these days.

All the percentages refer to moisture. Note that the wide variation in the values. Heat transfer occurs at a lower rate in materials of low thermal conductivity than in materials of high thermal conductivity. High thermal conductivity bulk ceramics.

Most frequently found htcc base high thermal conductivity ceramics are alumina and nitride ceramics such as aln bn and si 3 n 4 materials. Longitudinal heat flow tprc 1 page 24a. A theoretical analysis of the thermal conductivity κ v of metals and ceramics from their young s modulus e atomic weight m and density ρ based on a harmonic oscillator model is presented the κ v value is expressed as a g n 0 3 ρ e m 3 2 2 where a is the maximum displacement of a harmonic oscillator and equals the mean free path of lattice vibration g is the size factor. The r conductivity is the thermal conductivity radial to the annual rings t is tangential to those rings and u is unspecified.

This makes it an ideal material for use in electrical and thermal management situations. The table shows the range of values at room temperature for a number of frequently used ceramics from various sources.