Rare earth elements can be added to ceramics and glazes to reduce glaze cracking and give them a glossy appearance. Rare earth elements are mainly used as pigments for ceramics. Due to the unfilled 4f electrons of rare earth elements, they can absorb or emit light of different wavelengths from ultraviolet, visible to infrared light regions. The emission range of each light region is small, resulting in softer and purer colors, novel tones, and good smoothness of ceramics. Such as yellow, violet, green, peach, orange, brown, black, etc. Rare earth oxides can be used to manufacture high-temperature resistant transparent ceramics (applied in fields such as lasers) and high-temperature resistant crucibles (metallurgy).