Used in electronics as a dielectric material in capacitors due to its high permittivity. Commonly employed in thin-film form for advanced semiconductor devices and sensors. Serves as a substrate for growing high-temperature superconducting films. Utilized in optoelectronics because of its transparency and refractive properties. Found in some specialty glass and ceramic applications to modify electrical and thermal behavior. Historically used as a diamond simulant in jewelry, though this is less common today.