Erbium turns pink when oxidised and is therefore used as a colourant in the manufacture of porcelain. The element also enhances the performance of fibre-optic cables, which are required for high-speed internet. Furthermore, this rare element is used in medical lasers. The erbium:YAG laser is superior to conventional carbon-based lasers. This is because it generates less heat, making treatments less painful.
However, the practical application of this metal is relatively limited. This is due to its comparatively high cost and the small number of applications. Erbium in powder form for industrial or research purposes can be found in the GESTIS substance database under the CAS number 7440-52-0.
Detailed information
On the extraction of erbium
Discovered by Carl Gustav Mosander in 1843, this element – like all rare earths – is mined primarily in China. More recently, however, it has also been mined in Myanmar, Australia and the USA. After extraction, a complex further processing takes place. During this process, the various rare-earth elements – such as terbium, scandium and holmium – are separated from one another and refined.
Erbium as a cosmetic colourant
One of erbium’s most striking features is its characteristic pink colour. This arises during oxidation. This phenomenon makes the rare metal a sought-after colourant in the manufacture of glass and porcelain. Even small quantities impart a delicate, elegant shade to materials. It is valued in both arts and crafts and in industrial production processes. This colouring effect is particularly striking in decorative glass, high-quality display cases, crystalware and special ceramic products. The stability of the colour at different temperatures is a further advantage. It makes compounds of this rare earth element reliable colourants for demanding applications.
Erbium in communications technology
As well as its aesthetic uses, erbium metal plays a significant role in modern communications. In fibre-optic cables, it acts as an amplifier and significantly increases the signal range. This is due to its ability to efficiently amplify light pulses in the infrared spectrum. This is precisely the spectrum in which data transmission over long distances takes place. The introduction of erbium-doped fibre amplifiers (EDFAs) was a technological milestone. It was this development that made the construction of global high-speed fibre-optic networks possible in the first place. Thanks to this rare-earth element, data can be transmitted without the need for frequent intermediate amplification. This ensures high-performance, stable and fast internet connections.
Erbium in medicine
Rare earth elements have also established a firm foothold in medical technology. The erbium:YAG laser, in particular, is regarded as a technological advancement over conventional laser systems. It is frequently used in dermatology, dentistry and cosmetic surgery. Its key advantage lies in its specific wavelength, which is absorbed extremely well by the water in the tissues. This allows for extremely precise cuts and ablation without overheating the surrounding tissue. This reduces pain, minimises the risk of scarring and shortens healing time. In dentistry, for example, the Er:YAG laser enables the gentle removal of carious areas or the treatment of hard dental tissue. The drill, which is often feared by patients, is then no longer required.
Economic context
Despite these remarkable properties, the practical application of erbium remains relatively limited in many areas. This is partly due to the high costs of production, separation and purification Rare earths. Whilst the element is not extremely rare, its commercial extraction is technically complex. On the other hand, its fields of application have so far been relatively specialised and limited. Demand is concentrated in niche markets such as optical amplifiers, high-tech lasers, decorative glass production and certain alloys. It is therefore less relevant for broad industrial applications than other rare-earth elements such as praseodymium or Neodymium. These are used in magnets or wind turbines.
A look into the future
Erbium metal is undeniably a valuable element with great potential for the future. The further optical technologies, medical technology and specialised materials develop, the more important the properties of pure erbium could become.
