close
Choose Your Site
Global
Social Media
 |
| Quantity: | |
|---|---|
Terbium Oxide (Tb₄O₇) is a dark brown powder celebrated for its dual role in optoelectronics and magnetism, serving as the primary source of Tb³+ ions. With a CAS number of 12037-01-3 and a molecular weight of 747.64 g/mol, this rare-earth oxide offers purity levels from 99.9% to 99.99% (4N), featuring a melting point of 2330°C and a density of 7.3 g/cm³. Its strong green fluorescence under UV excitation and high magnetic susceptibility make it indispensable in lighting, displays, and high-frequency magnetic devices.
1. Bright Green Phosphorescence: Tb³+ ions emit intense green light at 545 nm when excited, critical for color-converting phosphors in LED and CRT displays.
2. Magnetic Anisotropy: High magnetocrystalline anisotropy enables use in terbium-doped iron garnets (TbIG) for microwave isolators and circulators.
3. Thermal Stability: Maintains structural integrity up to 2000°C, suitable for high-temperature phosphor applications in halogen lamps.
4. High Purity Control: Strict control of light rare-earth impurities like cerium and lanthanum (<0.1%) ensures consistent fluorescence purity and magnetic properties.
5. Solubility Flexibility: Partially soluble in inorganic acids to form Tb³+ solutions, facilitating wet-process synthesis of phosphors and magnetic fluids.
• LED Lighting: Serves as a green phosphor (e.g., Tb³+-doped aluminates), combining with blue chips and red phosphors to achieve white lighting with high color rendering index (CRI>90).
• Display Technologies: Used in the green fluorescent layer of CRT TVs and plasma displays, providing vibrant color reproduction and long-lasting luminescent performance.
• Magnetic Materials: Doped into ferrites to produce high-frequency magnetic cores, reducing eddy current losses in filters and transformers for 5G communication devices.
• Catalysis: Acts as a catalyst support for automotive exhaust treatment, enhancing the activity and poison resistance of NOx reduction reactions.
• Medical Research: The fluorescent properties of Tb³+ ions are utilized in bi test kits for time-resolved fluoroimmunoassay (TRFIA), enabling ultrasensitive detection of disease markers.
Q: What is the difference between Tb₄O₇ and TbO₂?
A: Tb₄O₇ is the most stable oxidation state with mixed valence (Tb³+/Tb⁴+), while TbO₂ is a dioxide mainly used in special redox reactions, with different application scenarios.
Q: Can Terbium Oxide be used in outdoor lighting?
A: Yes, its strong resistance to UV aging makes it suitable for preparing phosphors for streetlights and tunnel lights, maintaining luminous efficiency in humid and high-temperature environments.
Q: How is the particle size optimized for phosphor synthesis?
A: Typically provides 1-5μm spherical particles with surface coating of silicon or aluminum to improve dispersibility and anti-deliquescence, suitable for high-temperature solid-phase reactions.
Q: Are there radiation risks associated with Terbium Oxide?
A: No, the fluorescence excitation of Tb³+ ions is based on UV absorption, and the material itself is non-radioactive, complying with EU RoHS and US FDA safety standards.
Q: What is the shelf life of Terbium Oxide?
A: Under sealed storage conditions (<25°C, humidity <40%), the shelf life can reach 5 years. After opening, it is recommended to use it within 6 months to avoid moisture absorption.
Material name | Terbium oxide |
Formula | Tb2O3 |
CAS No. | 12036-41-8 |
EINECS NO. | 234-849-5 |
Molecular Weight | 365.85 |
Density | 7.910g/cm3 |
Melting point | 2410°C |
Appearance | White powder |
Purity/Specification (Tb2O3/REO) | 99%-99.999% |
Solubility | Stable at room temperature, insoluble in water, slightly soluble in acid. |
| Terbium Oxide Tb₄O7 | |||||||
| Purity | 2N5 | 3N | 3N5 | 4N | 4N5 | 5N | |
| REO%min | 99 | 99 | 99 | 99 | 99 | 99 | |
| Tb4O7/REO%min. | 99.5 | 99.9 | 99.95 | 99.99 | 99.995 | 99.999 | |
| Rare earth impurities %max. | LazO3 | Total 0.5 (Eu203+ Gd203+ Dy203+ Ho203+ Y203) | Total 0.1 (Eu203+ Gd203+ Dy203+ Ho203+ Y203) | Total 0.05 (Eu203+ Gd203+ Dy203+ Ho203+ Y203) | Total 0.002 | Total 0.001 | 0.00005 |
| CaO₂ | 0.00005 | ||||||
| Pr6011 | 0.00005 | ||||||
| Nd₂O3 | 0.00005 | ||||||
| Sm²O3 | 0.00005 | ||||||
| Er203 | 0.00005 | ||||||
| Tm203 | 0.00005 | ||||||
| Yb₂O3 | 0.00005 | ||||||
| Lu²O3 | 0.00005 | ||||||
| Eu²03 | 0.002 | 0.001 | 0.00005 | ||||
| Gd4O7 | 0.002 | 0.001 | 0.0001 | ||||
| Dy²O3 | 0.002 | 0.001 | 0.0002 | ||||
| Ho²O3 | 0.001 | 0.0005 | 0.00005 | ||||
| Y203 | 0.001 | 0.0005 | 0.00005 | ||||
| Non rare earth impurities %max. | Fe₂O3 | 0.002 | 0.002 | 0.002 | 0.0005 | 0.0003 | 0.0003 |
| CaO | 0.005 | 0.005 | 0.005 | 0.002 | 0.001 | 0.001 | |
| SiO₂ | 0.01 | 0.01 | 0.01 | 0.003 | 0.003 | 0.003 | |
| CT | 0.04 | 0.04 | 0.04 | 0.02 | 0.01 | 0.01 | |
| LO.I and Water %Max. | 1 | 1 | 1 | 1 | 1 | 1 | |
Terbium Oxide (Tb₄O₇) is a dark brown powder celebrated for its dual role in optoelectronics and magnetism, serving as the primary source of Tb³+ ions. With a CAS number of 12037-01-3 and a molecular weight of 747.64 g/mol, this rare-earth oxide offers purity levels from 99.9% to 99.99% (4N), featuring a melting point of 2330°C and a density of 7.3 g/cm³. Its strong green fluorescence under UV excitation and high magnetic susceptibility make it indispensable in lighting, displays, and high-frequency magnetic devices.
1. Bright Green Phosphorescence: Tb³+ ions emit intense green light at 545 nm when excited, critical for color-converting phosphors in LED and CRT displays.
2. Magnetic Anisotropy: High magnetocrystalline anisotropy enables use in terbium-doped iron garnets (TbIG) for microwave isolators and circulators.
3. Thermal Stability: Maintains structural integrity up to 2000°C, suitable for high-temperature phosphor applications in halogen lamps.
4. High Purity Control: Strict control of light rare-earth impurities like cerium and lanthanum (<0.1%) ensures consistent fluorescence purity and magnetic properties.
5. Solubility Flexibility: Partially soluble in inorganic acids to form Tb³+ solutions, facilitating wet-process synthesis of phosphors and magnetic fluids.
• LED Lighting: Serves as a green phosphor (e.g., Tb³+-doped aluminates), combining with blue chips and red phosphors to achieve white lighting with high color rendering index (CRI>90).
• Display Technologies: Used in the green fluorescent layer of CRT TVs and plasma displays, providing vibrant color reproduction and long-lasting luminescent performance.
• Magnetic Materials: Doped into ferrites to produce high-frequency magnetic cores, reducing eddy current losses in filters and transformers for 5G communication devices.
• Catalysis: Acts as a catalyst support for automotive exhaust treatment, enhancing the activity and poison resistance of NOx reduction reactions.
• Medical Research: The fluorescent properties of Tb³+ ions are utilized in bi test kits for time-resolved fluoroimmunoassay (TRFIA), enabling ultrasensitive detection of disease markers.
Q: What is the difference between Tb₄O₇ and TbO₂?
A: Tb₄O₇ is the most stable oxidation state with mixed valence (Tb³+/Tb⁴+), while TbO₂ is a dioxide mainly used in special redox reactions, with different application scenarios.
Q: Can Terbium Oxide be used in outdoor lighting?
A: Yes, its strong resistance to UV aging makes it suitable for preparing phosphors for streetlights and tunnel lights, maintaining luminous efficiency in humid and high-temperature environments.
Q: How is the particle size optimized for phosphor synthesis?
A: Typically provides 1-5μm spherical particles with surface coating of silicon or aluminum to improve dispersibility and anti-deliquescence, suitable for high-temperature solid-phase reactions.
Q: Are there radiation risks associated with Terbium Oxide?
A: No, the fluorescence excitation of Tb³+ ions is based on UV absorption, and the material itself is non-radioactive, complying with EU RoHS and US FDA safety standards.
Q: What is the shelf life of Terbium Oxide?
A: Under sealed storage conditions (<25°C, humidity <40%), the shelf life can reach 5 years. After opening, it is recommended to use it within 6 months to avoid moisture absorption.
Material name | Terbium oxide |
Formula | Tb2O3 |
CAS No. | 12036-41-8 |
EINECS NO. | 234-849-5 |
Molecular Weight | 365.85 |
Density | 7.910g/cm3 |
Melting point | 2410°C |
Appearance | White powder |
Purity/Specification (Tb2O3/REO) | 99%-99.999% |
Solubility | Stable at room temperature, insoluble in water, slightly soluble in acid. |
| Terbium Oxide Tb₄O7 | |||||||
| Purity | 2N5 | 3N | 3N5 | 4N | 4N5 | 5N | |
| REO%min | 99 | 99 | 99 | 99 | 99 | 99 | |
| Tb4O7/REO%min. | 99.5 | 99.9 | 99.95 | 99.99 | 99.995 | 99.999 | |
| Rare earth impurities %max. | LazO3 | Total 0.5 (Eu203+ Gd203+ Dy203+ Ho203+ Y203) | Total 0.1 (Eu203+ Gd203+ Dy203+ Ho203+ Y203) | Total 0.05 (Eu203+ Gd203+ Dy203+ Ho203+ Y203) | Total 0.002 | Total 0.001 | 0.00005 |
| CaO₂ | 0.00005 | ||||||
| Pr6011 | 0.00005 | ||||||
| Nd₂O3 | 0.00005 | ||||||
| Sm²O3 | 0.00005 | ||||||
| Er203 | 0.00005 | ||||||
| Tm203 | 0.00005 | ||||||
| Yb₂O3 | 0.00005 | ||||||
| Lu²O3 | 0.00005 | ||||||
| Eu²03 | 0.002 | 0.001 | 0.00005 | ||||
| Gd4O7 | 0.002 | 0.001 | 0.0001 | ||||
| Dy²O3 | 0.002 | 0.001 | 0.0002 | ||||
| Ho²O3 | 0.001 | 0.0005 | 0.00005 | ||||
| Y203 | 0.001 | 0.0005 | 0.00005 | ||||
| Non rare earth impurities %max. | Fe₂O3 | 0.002 | 0.002 | 0.002 | 0.0005 | 0.0003 | 0.0003 |
| CaO | 0.005 | 0.005 | 0.005 | 0.002 | 0.001 | 0.001 | |
| SiO₂ | 0.01 | 0.01 | 0.01 | 0.003 | 0.003 | 0.003 | |
| CT | 0.04 | 0.04 | 0.04 | 0.02 | 0.01 | 0.01 | |
| LO.I and Water %Max. | 1 | 1 | 1 | 1 | 1 | 1 | |
