Gadolinium Oxide Neutron Absorbing Cores - High Purity Ceramics from China Suppliers & Factory
Neutron Absorption and Nuclear Performance
Extremely High Thermal Neutron Absorption Cross-Section
Gadolinium oxide (Gd₂O₃) is one of the materials with the highest thermal neutron absorption cross-section in nature (~49,000 barns), far surpassing materials such as boron carbide (B₄C) and silicon carbide (SiC) in terms of thermal neutron capture and absorption efficiency, thereby effectively terminating chain reactions.
Radiation Stability
It maintains good structural integrity in strong radiation fields, with slow performance degradation and a long service life.
Low Radioactive Byproducts
Compared to other neutron-absorbing materials (such as europium oxide), the radioactive isotopes produced by gadolinium oxide after neutron absorption are relatively stable, making subsequent handling simpler.
High Temperature Performance and Thermal Stability
High Melting Point
The melting point exceeds 2400°C, allowing for structural stability in high-temperature reactors or high-temperature process environments.
High Temp Strength & Creep Resistance
It can maintain high mechanical strength and hardness at elevated temperatures, exhibiting good resistance to thermal creep and is not easily deformed.
Chemical and Physical Stability
Chemical Inertia
Exhibits excellent corrosion resistance against various molten metals (such as uranium, plutonium, and other nuclear fuels) and high-temperature chemical environments.
Low Thermal Expansion Coefficient
The thermal expansion coefficient is well-matched with many alloys and ceramics, helping to reduce thermal stress during thermal cycling.
Frequently Asked Questions
What is the thermal neutron absorption capacity of Gadolinium oxide (Gd₂O₃)?
Gadolinium oxide possesses an extremely high thermal neutron absorption cross-section of approximately 49,000 barns. This makes it one of the most efficient neutron capture materials available in nature.
How does Gadolinium oxide compare to boron carbide (B₄C) and silicon carbide (SiC)?
Gd₂O₃ far surpasses both boron carbide (B₄C) and silicon carbide (SiC) in terms of thermal neutron capture and absorption efficiency, allowing it to shut down chain reactions more effectively.
What is the melting point and temperature limit of Gadolinium oxide?
The melting point of Gadolinium oxide exceeds 2400°C, which ensures outstanding structural stability in extremely high-temperature reactor environments and industrial thermal processes.
Does Gd₂O₃ produce high levels of radioactive byproducts?
No. Compared to alternative materials like europium oxide, the radioactive isotopes generated by gadolinium oxide after absorbing neutrons are relatively stable, which simplifies the subsequent handling and disposal process.
How does Gadolinium oxide react with molten nuclear fuels?
Gadolinium oxide exhibits high chemical inertia. It provides excellent corrosion resistance against various molten metals, including active nuclear fuels such as uranium and plutonium.
Why is Gd₂O₃ resistant to thermal stress during temperature cycles?
Due to its low thermal expansion coefficient, Gadolinium oxide matches well with many alloys and ceramics, significantly reducing internal thermal stress during heating and cooling cycles.