Isotherms in diamond heat sinks, non-linear heat transfer in an excellent heat condition

A small fraction of all natural diamonds, called Type 2A diamonds, has a very low nitrogen content. In those diamonds thermal conductivity is primarily limited by carbon isotopes and dislocations. The heat conductivity at room temperature is typically 20 W/cm/ degrees C, the highest value for any known material at room temperature, but its heat conductivity is a nonlinear function of temperature. The use of Type 2A diamonds at heat sinks for microwave oscillators or diode laser substrates is described. A mathematical model of a copper-supported diamond heat sink is developed using an iterative scheme to compute the temperature and flux distribution at the diamond-copper boundary. Example results for a surface-mounted heat sink are presented.<
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