Samarium oxide is an inorganic metal oxide that is white and yellowish in powder form. It has a high melting point (2325 ° C) and a high density (8.35g/cm³), and is insoluble in water but soluble in acids. Samarium oxide has a wide range of applications in several fields, such as as a catalyst carrier for petroleum processing and air pollution control, and as a fuel cell catalyst shows potential in the energy sector. In addition, it is also a key raw material for the manufacture of high-performance magnetic materials such as permanent magnets, which can improve the magnetic properties of materials. In the field of optics, samarium oxide can be used as a glass additive to improve the refractive index and heat resistance of glass.