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Europium(III) oxide (Eu 2 O 3), is a chemical compound of europium and oxygen. It is widely used as a red or blue phosphor in television sets and fluorescent lamps , and as an activator for yttrium -based phosphors.
Europium oxide (Eu 2 O 3) is widely used as a red phosphor in television sets and fluorescent lamps, and as an activator for yttrium-based phosphors. [51] [52] Color TV screens contain between 0.5 and 1 g of europium oxide. [53]
Europium(II) oxide can be obtained by the reduction of europium(III) oxide with metallic europium at high temperatures. It has a rock-salt structure, is a deep red solid, and is ferromagnetic at 77 K. It has the potential to become a magnetic refrigeration material (ΔS mag =−143 mg/cm 3 K，50 kOe).
Europium oxide is a compound from the two elements europium and oxygen. Europium oxide may refer to: Europium(II) oxide (europium monoxide, EuO) a magnetic semiconductor. Europium(III) oxide (europium sesquioxide, Eu 2 O 3), the most common oxide.
3) or yttrium oxide sulfide (Y 2 O 2 S) host lattice doped with europium (III) cation (Eu 3+) phosphors. [15] [9] [i] The red color itself is emitted from the europium while the yttrium collects energy from the electron gun and passes it to the phosphor. [68] Yttrium compounds can serve as host lattices for doping with different lanthanide cations.
Phosphorescent materials were discovered in the 1700s, and people have been studying them and making improvements over the centuries.The development of strontium aluminate pigments in 1993 was spurred on by the need to find a substitute for glow-in-the-dark materials with high luminance and long phosphorescence, especially those that used promethium.
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Europium(II) oxide is a violet compound as a bulk crystal and transparent blue in thin film form. It is unstable in humid atmosphere, slowly turning into the yellow europium(II) hydroxide hydrate and then to white europium(III) hydroxide. [3] EuO crystallizes in a cubic sodium chloride structure with a lattice parameter a = 0.5144nm.