White powder. insoluble in water,Hardly soluble in hydrochloric acid，nitric acid and sulfuric acid,but soluble in perchloric. acid.hardly absorb moisture in air,stable. Nanoparticle yttrium oxide can be applied in high temperature spraying materials, fuel diluent of atomic energy reactor, permanent magnet material additives and getters in electronic industry.
Ceramic additive; spraying material;Coating material