Our aluminum nitride ceramics have outstanding thermal conductivity. It also has a low dielectric constant and has excellent electrical properties comparable to alumina. The thermal expansion rate is similar to that of silicon, and it has high specific strength, low density and non-toxicity. Product Details: Material: Aluminum Nitride. Function: Insulation and heat dissipation. Type: Ceramic. Color: Gray. Can be customed: Yes, please provide drawings of specific products.