Molecular formula: Y₂O₃

Appearance characteristics: white and slightly yellow powder, insoluble in water and alkali, soluble in acid.

Usage: Mainly used for manufacturing microwave magnetic materials and important military materials (single crystal; composite oxides such as yttrium iron garnet, yttrium aluminum garnet), also used as optical glass, ceramic material additives, large-screen TVs Use high-brightness phosphors for picture tube coatings. It is also used to manufacture film capacitors and special refractory materials, as well as magnetic bubble materials for high-pressure mercury lamps, lasers, and storage components. Adding yttrium oxide during sintering can effectively reduce the grain size of the tungsten alloy.

Molecular formula: HO₂O₃

Appearance characteristics: light yellow crystalline powder, insoluble in water, soluble in acid.

Usage: Used to make a new light source dysprosium holmium lamp, and also used as an additive for yttrium iron to obtain yttrium aluminum garnet and to produce metal holmium

Molecular formula: Pr+Nd₂O₃

Specifications (%): TREO≥99

Appearance characteristics: gray powder, insoluble in water, soluble in inorganic acid.

Use: Neodymium praseodymium oxide is used to produce neodymium praseodymium metal, neodymium iron boron permanent magnet materials, colorants, chemical additives, etc.

Chemical formula: Eu₂O₃

Appearance characteristics: light red powder, insoluble in water, soluble in inorganic acid, and can quickly absorb water and carbon dioxide in the air.

Use: It can be used as an activator for a variety of phosphors, and also as a control material for atomic reactors.

Chemical formula: Tb₂O₃

Appearance characteristics: brown powder, insoluble in water, soluble in acid.

Use: Mainly used as an activator for luminescent materials, and also as an additive for neodymium iron boron permanent magnet materials.