Europium oxide
Properties
Chemical formula: Eu₂O₃
Name: Europium(III) oxide / europium oxide
CAS No.: 1308-96-9
Molar mass: 351.92 g/mol
Density: 7.42 g/cm³
Melting point: approx. 2350 °C
Color: white to pale pink
Form: fine powder
Solubility: insoluble in water, soluble in inorganic acids
Europium(III) oxide (Eu₂O₃) is an inorganic compound belonging to the group of rare-earth oxides. It is supplied as a fine, odorless powder with a white to slightly pink appearance. With a melting point of approximately 2350 °C, europium oxide offers very high thermal stability.
Eu₂O₃ is insoluble in water but readily absorbs moisture and carbon dioxide from ambient air. In inorganic acids, the compound dissolves to form the corresponding europium(III) salts.
One of the most important properties of Eu³⁺ ions is their brilliant, narrow-band red photoluminescence with an emission wavelength of approximately 611 nm under UV excitation. When europium is reduced to the divalent Eu²⁺ state, intense blue to green emission can be obtained. This change in valence state allows different emission spectra to be produced.
Europium also has a very high thermal-neutron capture cross-section of approximately 4600 barns. This property makes europium compounds relevant for nuclear technology and neutron-absorbing applications.
Europium(III) oxide is typically produced by thermal calcination of europium oxalate or europium hydroxide at temperatures above 800 °C. The material is particularly important in phosphors, optoelectronics, security marking, nuclear technology, sensing and specialized optical materials.
Europium and its compounds are especially important for red phosphors used in LEDs, displays and fluorescent lighting. Would you like to buy europium oxide? Auremo can provide information about available grades and delivery conditions. The europium price, europium metal price and europium price per kg primarily refer to europium metal, while the europium oxide price depends on purity, quantity and material specifications.
Advantages
• Brilliant narrow-band red photoluminescence
• Emission around 611 nm from Eu³⁺ ions
• Tunable emission through Eu³⁺ / Eu²⁺ valence states
• High thermal-neutron absorption capacity
• Very high thermal stability
• Melting point of approximately 2350 °C
• Suitable for luminescent and optical materials
• Applicable in specialized nuclear and sensing systems
Applications
• Red phosphors
• LEDs and display technology
• Flat-panel and plasma displays
• Fluorescent lamps
• Security printing and fluorescent marking
• Banknotes, identity documents and certificates
• Nuclear technology
• Thermal-neutron absorbing materials
• Reactivity control
• Luminescent markers
• Fluorescence immunoassays
• Doping of solid-state lasers
• Specialty glasses and optical materials
Auremo offers europium oxide and other rare-earth materials for industrial and technical applications. If you have any questions about Eu₂O₃, available purity grades, product forms or delivery conditions, please contact us directly.
