rare earth oxide-lanthanum oxide
Lanthanum Oxide
Chemical CompositionLanthanum Oxide
La2O3/TREO (% min.)99.999999.99999.999599.9999.999
TREO (% min.)99.59999989898
Loss on ignition (% max.)111222
Rare Earth Impuritiesppm max.ppm max.ppm max.ppm max.% max.% max.
CeO2/TREO0.535500.050.5
Pr6O11/TREO0.535500.020.1
Nd2O3/TREO0.525500.020.1
Sm2O3/TREO0.225100.010.1
Y2O3/TREO0.555100.010.1
Non-Rare Earth Impuritiesppm max.ppm max.ppm max.ppm max.% max.% max.
Fe2O31210500.010.02
SiO21050501000.050.1
CaO1050501000.20.5
PbO551050
CoO2225
NiO2225
CuO2223
Brief information:

Formula: La2O3
CAS No.: 1312-81-8
Molecular Weight: 325.82
Density: 6.51 g/cm3
Melting point: 2315°C
Appearance: White powder
Solubility: Insoluble in water, moderately soluble in strong mineral acids
Stability: Strongly hygroscopic
Multilingual: LanthanOxid, Oxyde De Lanthane, Oxido De Lanthano

Application:

Lanthanum Oxide, also called Lanthana, high purity La2O3 (99.99% to 99.999%) is applied in making special optical glasses to improves the alkali resistance of glass,  and is used in La-Ce-Tb phosphors for fluorescent lamps and making special optical glasses, such as infrared-absorbing glass, as well as camera and telescope lenses, Low grade of La2O3 is widely used in ceramics and FCC catalyst, and also as raw material for Lanthanum Metal production; Lanthanum Oxide is also used as a grain growth additive during the liquid phase sintering of Silicon Nitride and Zirconium Diboride.