Overview
Gadolinium oxide (Gd₂O₃) is a white, odorless powder classified as a rare earth oxide. It is derived from gadolinium, a lanthanide element, and exhibits high thermal stability and paramagnetic properties. Due to its unique characteristics, it is a critical material in advanced industrial and scientific applications. Gd₂O₃ is produced through calcination of gadolinium salts or via precipitation methods. Its high melting point and insolubility in water make it suitable for high-temperature environments. The compound is commercially available in purities ranging from 99.9% to 99.99%, with higher grades used in specialized sectors like nuclear technology.
Physical and Chemical Properties
Gadolinium oxide is a dense (7.41 g/cm³), refractory material with a melting point of 2330°C and a boiling point exceeding 3900°C. Its cubic crystal structure contributes to its stability under extreme conditions. The compound is insoluble in water but dissolves in mineral acids, forming gadolinium salts. Key chemical properties include its paramagnetism, which is exploited in magnetic resonance imaging (MRI) contrast agents. It also exhibits low toxicity compared to other heavy metal oxides, though proper handling is still essential. Its optical properties, such as high refractive index, make it valuable in glass and ceramic formulations.
Main Applications
Gd₂O₃ is widely used in nuclear reactors as a neutron absorber due to gadolinium’s high neutron capture cross-section. It is also a component in control rods and shielding materials. In electronics, it serves as a dopant in phosphors for LEDs and cathode-ray tubes. The compound is integral to optical glass manufacturing, where it improves refractive index and durability. Additionally, gadolinium oxide is used in specialty ceramics and as a catalyst in organic synthesis. Emerging applications include its use in spintronics and quantum computing materials.
Safety and Storage
While gadolinium oxide is relatively low in toxicity, prolonged exposure to dust can cause respiratory irritation. Proper personal protective equipment (PPE), including gloves and masks, is recommended during handling. Storage should be in sealed containers, away from moisture and acidic environments to prevent degradation. In case of accidental exposure, rinse affected areas with water and seek medical advice if symptoms persist. Disposal should comply with local regulations for rare earth compounds, as improper handling may pose environmental risks.
B2B Procurement Guide
Industrial buyers should prioritize suppliers with ISO certifications and batch-specific purity analysis (e.g., ICP-MS reports). Key procurement considerations include particle size (for powder applications), packaging (moisture-proof bags or drums), and lead times, as gadolinium oxide is subject to rare earth market fluctuations. Pricing varies significantly based on purity (99.9% to 99.99%) and order volume. For reference, prices range from $50 to $200 per kilogram. Long-term contracts are advisable to mitigate price volatility, especially for high-purity grades used in nuclear or optical applications.
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