Overview
Terbium(III,IV) Oxide (Tb4O7) is a mixed-valence compound of terbium, combining both +3 and +4 oxidation states. It is a critical material in high-tech industries due to its role in green phosphors (e.g., for LED displays) and magneto-optical devices. As a rare-earth oxide, it is typically sourced from mineral deposits like xenotime or through ion-adsorption clays, followed by complex separation processes. Its stability at high temperatures and unique electron configuration make it valuable for applications requiring precise control of light emission or magnetic fields. The powder form allows for uniform dispersion in manufacturing processes, though handling requires care due to its fine particulate nature.
Physical and Chemical Properties
Tb4O7 exhibits a cubic crystal structure and is known for its dark brown to black coloration, which distinguishes it from other terbium oxides. The material is insoluble in water but can react with strong acids to form terbium salts. Its high melting point (≈2,300°C) and density (7.3 g/cm³) reflect its stability under extreme conditions. A key characteristic is its paramagnetism, which arises from unpaired 4f electrons. This property is exploited in magnetic refrigeration and data storage technologies. Under ultraviolet light, certain grades emit bright green luminescence, a trait leveraged in phosphor coatings for screens and lighting.
Main Applications
The primary use of Tb4O7 is in phosphors, particularly those emitting green light in cathode-ray tubes, fluorescent lamps, and X-ray intensifying screens. It is also a dopant in solid-state devices like lasers and optical fibers, where it modifies light transmission properties. In catalysis, it serves as an oxidative catalyst in organic synthesis and exhaust gas treatment. The nuclear industry utilizes its neutron-absorbing capability in control rods. Emerging applications include quantum computing components and advanced ceramic materials for aerospace, where its thermal resilience is critical.
Safety and Storage
As a fine powder, Tb4O7 poses inhalation risks and may irritate skin or eyes. Industrial users should employ NIOSH-approved respirators and gloves when handling. The material is not classified as flammable but may release hazardous fumes if heated above decomposition temperatures. Storage requires airtight containers in moisture-free environments to prevent caking or unintended reactions. Compatibility with common construction materials (e.g., stainless steel, polyethylene) simplifies containment. Spills should be vacuumed with HEPA-filtered equipment, not swept dry, to minimize airborne dispersion.
B2B Procurement Guide
When sourcing Tb4O7, prioritize suppliers with ISO 9001 certification and traceability documentation, given the geopolitical sensitivities around rare-earth supply chains. Technical specifications should detail purity (typically 99.9% or 99.99%), particle size distribution (e.g., 1-10 microns for most applications), and impurity profiles (especially thorium/uranium content for nuclear uses). Bulk purchases (25kg drums) often reduce unit costs by 15-20% compared to lab-scale quantities. Consider long-term contracts to hedge against price volatility, which is common in rare-earth markets. For specialized grades (e.g., ultra-high purity for electronics), lead times may extend to 8-12 weeks due to additional refining steps.
Related Manufacturers
- 主营：硝酸镧、硝酸铈、硝酸钇、氧化铈、氧化镧、氧化镨、氧化钕、氧化锆、氧化钇、氧化镱、硝酸镨、硝酸钕、硝酸锆、硝酸镱、氯化铈、氯化镧、氯化镱、氯化镨、氯化钕、氯化钇
- 主营：氯化镧、氯化铈、硝酸镧、氧化镧、氧化铈、氢氧化镧、氢氧化锆、硝酸铈、氯化钇、硝酸钇、无水氯化镧、无水氯化铈、硝酸铈铵、氯化钆、硝酸钆、硝酸钕、硝酸镨、氯化镨、氯化钕、氟化钇、氟化铈、醋酸镧、醋酸铈、醋酸锆、硝酸锆
- 主营：金纳米颗粒、银纳米颗粒、纳米银粉、二氧化硅微球、纳米铂粉、金纳米棒、金纳米粒子、磁性微球、磁性纳米颗粒、聚苯乙烯微球、荧光微球、纳米铂金溶液、聚乳酸微球、纳米磁珠、聚丙烯微球、聚乙烯微球、纳米金溶液、羧基磁珠、氨基磁珠、海藻酸钠微球、聚氯乙烯微球、pmma微球
- 主营：七氧化四铽、白蜡树素、百两金素、半齿泽兰素
- 主营：保护剂、碘化钾、抗氧剂、固体粉末、白色粉末、碘化钠、无味液体、迷迭香素、草酸钛钾、碱式碳酸铜、荧光增白剂、羟乙基磺酸钠、甲基丙烯酰氯、4 - 二氟苯胺、4'- 羟基苯丁酮、二碳酸二叔丁酯、原异丁酸三甲酯