Electrical Insulation: Aluminum Nitride is an excellent electrical insulator, with a dielectric strength of 10-15 MV/m. It is also a good thermal insulator, with a low thermal expansion coefficient of 4.5-5.5 ppm/K. This makes it suitable for use in electronic components such as substrates, high-power LEDs, and power modules. Optical Properties: Aluminum Nitride has a wide bandgap of 6.2 eV, which makes it transparent in the UV and visible regions of the electromagnetic spectrum. It has a refractive index of 1.8-2.0 and a high optical absorption coefficient in the UV region. These optical properties make it useful for applications such as UV photodetectors and transparent protective coatings.
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