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Lanthanum Cerium Mischmetal is a silvery-gray alloy primarily composed of lanthanum (30-50%) and cerium (40-60%), with minor amounts of praseodymium and neodymium. With a CAS number of 68648-85-5 and a density of 6.5 g/cm³, this cost-effective rare-earth alloy offers a balanced combination of reactivity, thermal conductivity, and mechanical strength. Its ability to form stable intermetallic compounds and improve molten metal properties makes it a staple in foundries, battery industries, and environmental technologies.
1. Oxidation Resistance: Forms a protective mixed oxide layer (La₂O₃/CeO₂) at 400°C, reducing scaling in high-temperature applications compared to pure lanthanum or cerium.
2. Desulfurization Efficiency: Reacts with sulfur in molten steel to form stable sulfides (La₂S₃/Ce₂S₃), lowering sulfur content from 0.05% to <0.01% in steelmaking processes.
3. Grain Refinement: Added to aluminum and magnesium alloys to refine dendritic structures, improving tensile strength by 20% and ductility by 15%.
4. Electrical Conductivity: Moderate conductivity (1.5×10⁶ S/m) makes it suitable for electrical contacts in low-voltage, high-current systems like battery terminals.
5. Cost-Effective Alloying: Offers similar performance to pure rare-earth metals at a fraction of the cost, leveraging the abundance of lanthanum and cerium in ore deposits.
• Steel & Cast Iron Production: Used as a nodulizing agent in ductile iron, converting graphite flakes to spheroids and enhancing impact resistance for automotive components.
• Battery Technologies: Added to lead-acid battery grids to reduce corrosion and improve charge acceptance, extending cycle life by 15% in renewable energy storage systems.
• Flame Retardants: Combined with zinc oxide in polyolefin plastics, suppressing combustion by catalyzing char formation and reducing smoke density.
• Glass Manufacturing: Acts as a clarifier in optical glass production, removing gas bubbles through redox reactions with residual oxides.
• Catalysis: Supports for diesel oxidation catalysts (DOCs), promoting the conversion of CO and hydrocarbons at lower temperatures (200-300°C) in automotive exhaust systems.
Q: What is the typical lanthanum-to-cerium ratio in mischmetal?
A: Standard grades are 50% Ce/40% La/10% other REE, with custom ratios (e.g., 30% Ce/60% La) available for specialized metallurgical needs.
Q: How does it compare to pure cerium in desulfurization?
A: The lanthanum component provides higher sulfur affinity, enabling deeper desulfurization in lower-temperature molten metal baths.
Q: Can it be used in additive manufacturing powders?
A: Yes, as a master alloy in aluminum 3D printing feedstocks, improving solidification behavior and reducing porosity in printed components.
Q: What precautions are needed for storage?
A: Store in sealed containers under mineral oil to prevent surface oxidation; avoid contact with moisture, which may generate flammable hydrogen gas.
Q: Is there a regulatory restriction on mischmetal exports?
A: Export controls vary by country, but our products comply with all ITAR and EAR regulations for dual-use applications.
Material name | Lanthanum Cerium Mischmetal |
Other Name | La-Ce Mischmetal, Misch metal, Cerium mischmetal |
Formula | La-Ce |
Content | La around 35%, Ce around 65% |
Appearance | Silver grey ingot or lump, or other customized size |
TREM | 99%min |
Chemical Composition ( W / %) | ||||
TREM | ≥99 | C | 0.027 | |
La/TREM | 35.53 | Fe | 0.45 | |
Ce/TREM | 64.47 | Mg | < 0.03 | |
Pr/TREM | < 0.01 | Si | < 0.02 | |
Nd/TREM | < 0.01 | S | < 0.02 | |
Sm/TREM | < 0.01 | |||
Y/TREM | < 0.01 | |||
Lanthanum Cerium Mischmetal is a silvery-gray alloy primarily composed of lanthanum (30-50%) and cerium (40-60%), with minor amounts of praseodymium and neodymium. With a CAS number of 68648-85-5 and a density of 6.5 g/cm³, this cost-effective rare-earth alloy offers a balanced combination of reactivity, thermal conductivity, and mechanical strength. Its ability to form stable intermetallic compounds and improve molten metal properties makes it a staple in foundries, battery industries, and environmental technologies.
1. Oxidation Resistance: Forms a protective mixed oxide layer (La₂O₃/CeO₂) at 400°C, reducing scaling in high-temperature applications compared to pure lanthanum or cerium.
2. Desulfurization Efficiency: Reacts with sulfur in molten steel to form stable sulfides (La₂S₃/Ce₂S₃), lowering sulfur content from 0.05% to <0.01% in steelmaking processes.
3. Grain Refinement: Added to aluminum and magnesium alloys to refine dendritic structures, improving tensile strength by 20% and ductility by 15%.
4. Electrical Conductivity: Moderate conductivity (1.5×10⁶ S/m) makes it suitable for electrical contacts in low-voltage, high-current systems like battery terminals.
5. Cost-Effective Alloying: Offers similar performance to pure rare-earth metals at a fraction of the cost, leveraging the abundance of lanthanum and cerium in ore deposits.
• Steel & Cast Iron Production: Used as a nodulizing agent in ductile iron, converting graphite flakes to spheroids and enhancing impact resistance for automotive components.
• Battery Technologies: Added to lead-acid battery grids to reduce corrosion and improve charge acceptance, extending cycle life by 15% in renewable energy storage systems.
• Flame Retardants: Combined with zinc oxide in polyolefin plastics, suppressing combustion by catalyzing char formation and reducing smoke density.
• Glass Manufacturing: Acts as a clarifier in optical glass production, removing gas bubbles through redox reactions with residual oxides.
• Catalysis: Supports for diesel oxidation catalysts (DOCs), promoting the conversion of CO and hydrocarbons at lower temperatures (200-300°C) in automotive exhaust systems.
Q: What is the typical lanthanum-to-cerium ratio in mischmetal?
A: Standard grades are 50% Ce/40% La/10% other REE, with custom ratios (e.g., 30% Ce/60% La) available for specialized metallurgical needs.
Q: How does it compare to pure cerium in desulfurization?
A: The lanthanum component provides higher sulfur affinity, enabling deeper desulfurization in lower-temperature molten metal baths.
Q: Can it be used in additive manufacturing powders?
A: Yes, as a master alloy in aluminum 3D printing feedstocks, improving solidification behavior and reducing porosity in printed components.
Q: What precautions are needed for storage?
A: Store in sealed containers under mineral oil to prevent surface oxidation; avoid contact with moisture, which may generate flammable hydrogen gas.
Q: Is there a regulatory restriction on mischmetal exports?
A: Export controls vary by country, but our products comply with all ITAR and EAR regulations for dual-use applications.
Material name | Lanthanum Cerium Mischmetal |
Other Name | La-Ce Mischmetal, Misch metal, Cerium mischmetal |
Formula | La-Ce |
Content | La around 35%, Ce around 65% |
Appearance | Silver grey ingot or lump, or other customized size |
TREM | 99%min |
Chemical Composition ( W / %) | ||||
TREM | ≥99 | C | 0.027 | |
La/TREM | 35.53 | Fe | 0.45 | |
Ce/TREM | 64.47 | Mg | < 0.03 | |
Pr/TREM | < 0.01 | Si | < 0.02 | |
Nd/TREM | < 0.01 | S | < 0.02 | |
Sm/TREM | < 0.01 | |||
Y/TREM | < 0.01 | |||
