Gadolinium Oxide Neutron Absorbing Cores | High-Quality Ceramic from China Supplier and 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 Temperature Strength and 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.
Why does Gadolinium Oxide (Gd₂O₃) have superior neutron absorption capability?
Gadolinium oxide possesses one of the highest thermal neutron absorption cross-sections in nature (~49,000 barns). This enables it to capture and absorb thermal neutrons far more efficiently than standard materials like boron carbide (B₄C) and silicon carbide (SiC), effectively terminating chain reactions.
How does Gd₂O₃ perform in high-radiation environments?
Gd₂O₃ exhibits exceptional radiation stability. It maintains its structural integrity even when exposed to strong radiation fields, experiencing very slow performance degradation and offering a long service life.
What are the advantages of Gd₂O₃ regarding radioactive byproducts?
Unlike other materials like europium oxide, the radioactive isotopes produced after gadolinium oxide absorbs neutrons are relatively stable. This makes post-operation handling and disposal processes much simpler and safer.
Can Gadolinium Oxide withstand extreme temperatures?
Yes, Gd₂O₃ has a melting point exceeding 2400°C. This allows it to remain structurally stable in high-temperature nuclear reactors or demanding high-temperature industrial process environments.
How does Gd₂O₃ react with molten nuclear fuels?
Gd₂O₃ features excellent chemical inertia, providing high corrosion resistance against various molten metals, including uranium, plutonium, and other corrosive nuclear fuel environments.
Does Gd₂O₃ crack easily under thermal cycling?
No, it has a low thermal expansion coefficient that is well-matched with many alloys and ceramics, which significantly reduces thermal stress during rapid temperature changes and prevents cracking or deformation.