Overview
Erbium is a lanthanide series rare earth metal discovered in 1843 by Carl Gustaf Mosander. It ranks 44th in abundance among Earth's elements and is typically extracted from minerals like xenotime and euxenite through ion-exchange processes. In its pure form, erbium is malleable and stable in air, though it oxidizes slowly. The element's most distinctive feature is its pink-colored Er³⁺ ions, which have made it valuable for specialized glass and ceramic applications.
Physical and Chemical Properties
As a trivalent element, erbium exhibits typical lanthanide characteristics including high density (9.066 g/cm³) and melting point (1529°C). Its hexagonal close-packed crystal structure contributes to metallic properties like electrical conductivity. Chemically, erbium reacts with halogens to form trihalides and dissolves in mineral acids. The element's 4f electron configuration gives rise to sharp absorption bands in the visible spectrum, enabling its use in optical filters. Notably, erbium has a high neutron absorption cross-section of 165 barns, making it valuable in nuclear applications.
Main Applications
The telecommunications industry consumes approximately 80% of produced erbium for fiber optic amplifiers (EDFAs), where Er³⁺ ions boost signal strength at 1550 nm wavelengths. In nuclear technology, erbium's neutron-absorbing properties make it ideal for control rods and shielding. Metallurgically, erbium improves workability in vanadium and nickel alloys. The glass industry uses erbium oxide (Er₂O₃) for pink coloring and UV protection in sunglasses. Emerging applications include upconversion nanoparticles for medical imaging and erbium-doped lasers for dermatology.
Safety and Storage
Erbium metal dust presents fire hazards (ignition temperature ~160°C) and requires Class D extinguishers. The powder form is pyrophoric and must be handled under argon or nitrogen atmospheres. For storage, keep erbium in sealed containers with desiccants. Bulk metal should be coated with petroleum jelly or stored under mineral oil to prevent oxidation. Personnel handling erbium compounds should use NIOSH-approved P100 respirators due to potential lung irritation from fine particles.
B2B Procurement Guide
Industrial buyers should specify purity levels (standard 99.9%, high purity 99.99%) and physical form - ingots for metallurgy, powder for chemical processes, or foil for research. Isotopically enriched erbium (e.g., Er-167) commands premium pricing. Leading suppliers include China (90% of global production), the U.S., and Russia. Minimum order quantities typically start at 1 kg for standard grades. Due to strategic importance, some countries restrict erbium exports, requiring import licenses for certain applications.
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