1. Mainly used in the manufacture of precision optical glass, optical fiber. Also used in the electronics industry for ceramic capacitor, piezoelectric ceramic with agent. Also used as the material of lanthanum system boride, separation of oil refining catalysts.
2. Used in the manufacture of special alloy, high precision optical glass refraction optical fiber board and camera lenses, camera, microscope and advanced optical instruments prism and so on. Ceramic industry used in the manufacture of ceramic capacitors and piezoelectric ceramic with agent and X-ray emitting material bromine lanthanum oxide powder, etc. As catalysts for a variety of reactions. Lanthanum oxide leaching into lithium oxide or zirconium oxide used in the manufacture of ferrite magnets. To improve barium titanate, strontium titanate ferroelectric temperature dependence and dielectric properties, and manufacture fiber optics and optical glass.