Terbium Oxide
Terbium Oxide (Tb4O7, CAS 12037-01-3), 99.9–99.999%, supplied wholesale by Zyntex. Rare earth oxide for NdFeB coercivity enhancement, green phosphors, TGG magneto-optical crystals and Terfenol-D. CoA and SDS.
Description
Terbium Oxide Product Overview
Terbium oxide (Tb4O7) is a dark brown, homogeneous powder that is insoluble in water and dissolves in hot acids. It contains terbium in mixed oxidation states, which explains its dark color, unlike most white rare earth oxides.
Magnet producers use terbium, often applied by grain boundary diffusion, to raise the coercivity of NdFeB magnets for electric vehicle motors and wind turbines, similarly to Dysprosium Oxide. Phosphor producers use terbium for bright green phosphors in lighting and displays, while crystal growers use it for terbium gallium garnet (TGG), the standard magneto-optical crystal in laser isolators. It is also a component of the magnetostrictive alloy Terfenol-D.
Because terbium is among the scarcest rare earths, supply security matters to buyers. Related rare earth oxides in our range also include Neodymium(III) oxide, Europium Oxide and Gadolinium Oxide.
Key Applications of Terbium Oxide
Typical uses include, for example:
🧲 Permanent Magnets
Coercivity enhancer for NdFeB magnets.
💡 Green Phosphors
Activator for lighting as well as displays.
🔦 Magneto-Optics
Raw material for TGG Faraday isolators.
⚙️ Terfenol-D
Component of magnetostrictive alloys.
Terbium Oxide Technical Specifications
| Parameter | Standard Value |
|---|---|
| Product Name | Terbium Oxide |
| CAS Number | 12037-01-3 |
| Molecular Formula | Tb4O7 |
| Purity Grade (REO) | 99.9% to 99.999% |
| Physical Presentation | Dark Brown Homogeneous Powder |
| Documents | CoA as well as SDS with every lot |
⚠️ Safety & Handling: May cause eye and respiratory irritation. Avoid dust formation and also wear dust protection and eye protection. Store in tightly closed containers in a dry place. Always consult the Safety Data Sheet (SDS), because it contains the full classification and handling instructions.
Frequently Asked Questions
Why is terbium added to NdFeB magnets?
Because it strongly increases coercivity, magnets keep their strength at high temperatures in EV motors and wind turbines.
Why is terbium oxide dark brown?
Because it contains terbium in mixed oxidation states, whereas most other rare earth oxides contain only the trivalent form and are white.
How can I get a price and documents?
Prices depend on quantity, packaging and destination, so please contact us with your required volume. We then send a quotation together with the CoA and SDS.
