Terbium Metal (Tb Metal)

Categories Rare earth, Terbium

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Additional information

Item Number	ME65
Product Name	Terbium (Tb) Metal
CAS Number	7440-27-9
M. F.	Tb
Purity	99%; 99.9%; 99.99% (REM)
Appearance	Silvery lump pieces, ingots, rod, foil, wire, etc.

Description:

Terbium is a silvery-white, malleable, and ductile rare earth metal in the lanthanide series (atomic number 65). It is relatively stable in air but slowly oxidizes, forming Tb₂O₃ (terbium oxide). Terbium exhibits strong magnetic properties and is highly luminescent, making it valuable in advanced technologies.

Symbol: Tb
Atomic Number: 65
Atomic Weight: 158.92535
Melting Point: 1,356°C (2,473°F)
Boiling Point: 3,230°C (5,846°F)
Density: 8.23 g/cm³

Applications:

Phosphors for Lighting & Displays

Green Phosphors (Tb³⁺):
- Used in trichromatic fluorescent lamps (combined with europium for red and blue).
- Critical for LEDs, LCDs, and plasma displays to produce vibrant green colors.
- Example: CeMgAl₁₁O₁₉:Tb³⁺ (CAT) is a common green phosphor.

Solid-State Devices & Magnets

Terfenol-D (TbDyFe₂):
- A magnetostrictive alloy that expands/contracts in magnetic fields, used in:
- Sonar systems (naval applications).
- Precision actuators & sensors (aerospace, robotics).
- Vibration control systems.

Data Storage & Optoelectronics

Magneto-Optical Recording:
- Terbium-doped garnet films (Tb₃Fe₅O₁₂) enable high-density data storage (e.g., rewritable discs).
Fiber Optics:
- Used in optical amplifiers for telecommunications.

Nuclear Applications

Neutron Absorption:
- Terbium is used in control rods for nuclear reactors due to its high neutron capture cross-section.

Medical & Biomedical Uses

MRI Contrast Agents:
- Terbium complexes are explored as contrast enhancers in magnetic resonance imaging.
X-ray Phosphors:
- Tb-doped materials improve imaging resolution in medical X-ray screens.

Lasers & Fluorescent Probes

Green Laser Diodes:
- Terbium-doped crystals (e.g., LiNbO₃:Tb³⁺) are used in solid-state lasers.
Biolabeling:
- Tb³⁺ ions are used in fluorescent tags for biochemical assays.