Enhancing the thermal conductivity of â-Si 3N 4 ceramics
Silicon nitride ceramics are important engineering materials due to their excellent properties such as fracture toughness, wear resistance and high temperature strength. They were originally developed to compete with metallic parts and now find application in such areas as engine components, glow plugs for diesel engines, cutting tools, bearings, nozzles and kiln furniture.
Thermal conductivity is an important physical property of Si 3N 4 ceramics. As the thermal conductivity strongly influences the rate of heat dissipation, this determines the reliability and performance of components in many industrial applications. In vehicle engines, low thermal conductivity is desired for heat insulation components to decrease fuel consumption, while high conductivity is required for cooling components with good thermal shock resistance.
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