Aluminum Nitride's thermal conductivity is as much as seven times that of the most widely used alumina ceramics, while the low dielectric constant provides excellent electrical properties rivaling those of alumina, thermal expansion similar to that of silicon, high strength, low density and non-toxicity. Product Details: Material: Aluminum Nitrde. Function: Heat dissipation and insulation ceramic. Type: Ceramic. Color:Gray. Can be customed: Yes, please provide drawings of specific products.