Dysprosium oxide
2026-04-08
Introduction to Dysprosium Oxide
Dysprosium oxide, chemical formula Dy₂O₃, molecular weight 372.998. The appearance is a white or light yellow crystalline powder (color varies with purity), with a relative density of 7.81 g/mL (25 °C), a melting point of 2330-2350 °C, and a boiling point of 3900 °C (atmospheric pressure). Insoluble in water and alkaline solutions, soluble in inorganic acids (except HF and H₃PO₄), and easily absorbs moisture and carbon dioxide in the air to form basic carbonates. It should be stored in a ventilated and dry warehouse.
Dysprosium Oxide Properties:
Basic Information | Product Name | Dysprosium Oxide; Dysprosia |
Molecular Formula | Dy₂O₃ | |
Molecular Weight | 373.00 g/mol | |
Physical Properties | Appearance | White to pale yellow crystalline powder |
Odor | Odorless | |
Density | 7.81 g/cm³ (25°C) | |
Melting Point | 2330–2350°C | |
Boiling Point | ~3900°C | |
Solubility | Insoluble in water; soluble in mineral acids; slightly soluble in ethanol | |
Crystal Structure | Cubic (room temperature) | |
Chemical Properties | Stability | Stable under normal conditions; reacts with CO₂ to form dysprosium carbonate |
Acidity / Alkalinity | Basic oxide | |
Reactivity | Reacts with strong acids to form dysprosium salts |
Dysprosium Oxide Applications:
- Raw material for metallic dysprosium
- Additive for NdFeB permanent magnets
- Optical glass & ceramics
- Fluorescent powders
- Nuclear reactor control rods (neutron absorber)
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