Terbium oxide (Tb4O7) has several applications, but its main use is as a component in the production of phosphors, which are materials that emit light when exposed to certain forms of energy, such as electrons or ultraviolet (UV) light. Here are some of the main applications of terbium oxide:
1.Cathode Ray Tube (CRT) Displays: Terbium oxide is used in the phosphors of CRT displays, such as old-style television screens and computer monitors. When electrons strike the terbium-based phosphors, they emit visible light, producing the images on the screen.
2.Fluorescent Lighting: Terbium oxide is also employed in the production of fluorescent lighting, including fluorescent lamps and compact fluorescent lamps (CFLs). It helps generate white light when UV radiation stimulates the phosphor coating inside these lamps.
3.Color Television Tubes: In color television tubes, terbium oxide is utilized to create red and green phosphors, which contribute to the color display by emitting light when struck by electrons.
4.X-ray Imaging: Terbium oxide can be used as a phosphor in X-ray imaging screens to convert X-rays into visible light, making it easier for medical professionals to view X-ray images.
5.Magneto-optical Materials: Terbium oxide is employed in magneto-optical materials, which have applications in data storage, optical isolators, and other optical devices.
6.Glass and Ceramics: Terbium oxide can be added to glass and ceramic materials to create materials with specific optical properties, such as coloration or UV absorption.
7.Catalysts: In some cases, terbium oxide can be used as a catalyst in chemical reactions, although this application is less common than its use in phosphors and optical materials.

Terbium oxide (Tb4O7) Also used in the production of terbium metal, optical glass, magneto-optical storage, magnetic materials, activators for fluorescent powders, and additives for garnet, etc.