Cas 12055-62-8 Holmium Oxide Ho2o3 Scintillation Crystals Light Yellow Powder

Holmium Oxide (Ho₂O₃): Dy/Ho Lamps, Scintillation Crystals, Spectrometer Standards, Ho/Fe Alloys for NdFeB

Holmium oxide is an inorganic compound with the chemical formula Ho2O3, composed of the rare earth element holmium and oxygen. Along with dysprosium oxide, it is one of the most paramagnetic substances known. Holmium oxide is a component of erbia minerals. In its natural state, it typically coexists with trivalent oxides of other lanthanides and requires specialized methods for separation. Holmium oxide can be used to prepare special colored glasses. Glasses and solutions containing holmium oxide exhibit a series of sharp peaks in their visible absorption spectra, making them traditionally useful as calibration standards for spectrophotometers.

Applications

1. Used in manufacturing new light sources such as dysprosium-holmium lamps.
2. Used as additive for growing special scintillation crystals.
3. Can be used as calibration standard for spectrophotometers.
4. Used to produce metallic holmium or holmium-iron alloys, added to neodymium-iron-boron (NdFeB) magnetic materials.

Product Series

Health and Safety Information

Packaging Specifications

• Standard packaging: 50 kg/drum, 500 kg/pallet, ton bags
• Sample packaging: 500 g/bag, 1 kg/bottle

About Holmium Oxide

The main production method for holmium oxide is the oxalate precipitation method, using holmium chloride or holmium nitrate solution as raw material. The pH is adjusted to 2 with oxalic acid, then precipitated with ammonia to form holmium oxalate. After heating, aging, separation and washing, the product is dried at 110°C, and finally calcined at 900-1000°C to obtain holmium oxide.

Depending on lighting conditions, holmium oxide exhibits quite significant color changes. Under sunlight it appears light yellow, while under RGB light sources it shows strong orange-red color, almost indistinguishable from erbium oxide under the same conditions, which is related to its sharp phosphorescence emission bands. Holmium oxide has a band gap as wide as 5.3 eV, so it should theoretically be colorless. The yellow color of holmium oxide is caused by a large number of lattice defects (such as oxygen vacancies) and internal conversion of Ho3+.