Used in electronics as a dielectric material in capacitors due to its high dielectric constant. 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 optical 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 less common today.