Sapphire windows are often chosen for their excellent dielectric properties.
Sapphire is an insulating material with a high dielectric strength, which makes it ideal for use in environments where electrical isolation is required, such as in high-voltage or high-frequency applications. Additionally, sapphire has a wide bandgap, making it transparent to a range of electromagnetic wavelengths, including ultraviolet (UV), visible, and infrared light.
This combination of dielectric properties and optical transparency makes sapphire windows highly valuable in industries such as telecommunications, optics, aerospace, and high-power electronics.