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Cerium Oxalate (Ce₂(C₂O₄)₃·9H₂O) is a pale yellow crystalline powder valued for its role as a high-purity precursor in cerium processing and nanomaterial synthesis. With a CAS number of 57001-67-7 and a molecular weight of 668.43 g/mol (hydrated form), this compound offers purity levels of 99.9%-99.99% (4N), featuring low solubility in water (0.03 g/L at 25°C) and predictable thermal decomposition into CeO₂. Its ability to selectively precipitate Ce³+ ions from mixed rare-earth solutions makes it a cornerstone in lanthanide separation technologies.
Selective Precipitation: Enables efficient separation of cerium from lanthanum, praseodymium, and neodymium in ore leachates, achieving purity boosts of 25-30% in single-stage processes.
Controlled Thermal Decomposition: Releases 结晶水 at 100-150°C and decomposes to CeO₂ at 500-600°C, yielding a nanocrystalline oxide with high oxygen storage capacity (OSC> 200 μmol/g).
Low Rare-Earth Impurities: Strict purification reduces adjacent lanthanide levels to <0.1%, critical for producing electronics-grade cerium dioxide.
Flowable Powder Structure: Uniform particle size (D50=5-10 μm) with low agglomeration, facilitating easy handling in automated separation and synthesis lines.
Stable Hydration State: Maintains nine crystal water molecules under standard storage conditions, ensuring consistent stoichiometry for precise material synthesis.
Cerium plays a vital role in rare earth refinement, enabling the production of ultra-high-purity cerium oxide for precision glass polishing, such as LCD panels. Even minimal lanthanum contamination can cause optical defects, making CeO₂ indispensable for achieving superior surface quality and high-clarity displays.
Cerium oxide is extensively used as a precursor in automotive three-way catalysts. Its ability to store and release oxygen enhances redox reactions in exhaust systems, improving emission control, catalytic efficiency, and compliance with environmental regulations for modern vehicles.
Cerium compounds are essential in nanomaterial synthesis via sol-gel and hydrothermal techniques. CeO₂ nanoparticles with tunable morphologies—spherical, rod-like, or cubic—are developed for advanced energy storage, catalysis, and electronic applications, delivering optimized surface area and performance characteristics.
In research, cerium-based compounds serve as standard reagents for thermogravimetric analysis (TGA) and as precursors for cerium-doped graphene composites in supercapacitors. These materials support high-precision studies and enhance energy storage performance in next-generation electronic devices.
As an additive in zirconia ceramics, cerium functions as a sintering aid, lowering densification temperature by approximately 150°C. This improves fracture toughness and mechanical reliability, making CeO₂ highly valuable for dental crowns and high-performance structural ceramic applications.
Q: Why is oxalate preferred over nitrate for cerium separation?
A: Oxalate precipitation offers higher selectivity for Ce³+ and lower sodium contamination, critical for producing high-purity cerium compounds for electronics.
Q: What is the optimal calcination atmosphere for forming CeO₂?
A: Heating in air at 600°C for 2 hours ensures complete conversion to CeO₂ with minimal Ce³+ residual (<1%), suitable for catalytic applications.
Q: Can it be used in aqueous-based synthesis without calcination?
A: Yes, when dissolved in nitric acid, it provides a clear Ce³+ solution for co-precipitation with other rare-earth oxalates to create multi-element oxide powders.
Q: How does humidity affect storage stability?
A: Store in airtight containers with desiccants; prolonged exposure to >60% RH may cause slight hydration layer growth but does not impact chemical reactivity.
Q: Is this product compliant with ISO 13485 for medical device applications?
A: Yes, 4N-grade products undergo additional biocompatibility testing, with heavy metal levels far below allowable limits for dental and surgical ceramics.
Cerium Oxalate (Ce₂(C₂O₄)₃·9H₂O) is a pale yellow crystalline powder valued for its role as a high-purity precursor in cerium processing and nanomaterial synthesis. With a CAS number of 57001-67-7 and a molecular weight of 668.43 g/mol (hydrated form), this compound offers purity levels of 99.9%-99.99% (4N), featuring low solubility in water (0.03 g/L at 25°C) and predictable thermal decomposition into CeO₂. Its ability to selectively precipitate Ce³+ ions from mixed rare-earth solutions makes it a cornerstone in lanthanide separation technologies.
Selective Precipitation: Enables efficient separation of cerium from lanthanum, praseodymium, and neodymium in ore leachates, achieving purity boosts of 25-30% in single-stage processes.
Controlled Thermal Decomposition: Releases 结晶水 at 100-150°C and decomposes to CeO₂ at 500-600°C, yielding a nanocrystalline oxide with high oxygen storage capacity (OSC> 200 μmol/g).
Low Rare-Earth Impurities: Strict purification reduces adjacent lanthanide levels to <0.1%, critical for producing electronics-grade cerium dioxide.
Flowable Powder Structure: Uniform particle size (D50=5-10 μm) with low agglomeration, facilitating easy handling in automated separation and synthesis lines.
Stable Hydration State: Maintains nine crystal water molecules under standard storage conditions, ensuring consistent stoichiometry for precise material synthesis.
Cerium plays a vital role in rare earth refinement, enabling the production of ultra-high-purity cerium oxide for precision glass polishing, such as LCD panels. Even minimal lanthanum contamination can cause optical defects, making CeO₂ indispensable for achieving superior surface quality and high-clarity displays.
Cerium oxide is extensively used as a precursor in automotive three-way catalysts. Its ability to store and release oxygen enhances redox reactions in exhaust systems, improving emission control, catalytic efficiency, and compliance with environmental regulations for modern vehicles.
Cerium compounds are essential in nanomaterial synthesis via sol-gel and hydrothermal techniques. CeO₂ nanoparticles with tunable morphologies—spherical, rod-like, or cubic—are developed for advanced energy storage, catalysis, and electronic applications, delivering optimized surface area and performance characteristics.
In research, cerium-based compounds serve as standard reagents for thermogravimetric analysis (TGA) and as precursors for cerium-doped graphene composites in supercapacitors. These materials support high-precision studies and enhance energy storage performance in next-generation electronic devices.
As an additive in zirconia ceramics, cerium functions as a sintering aid, lowering densification temperature by approximately 150°C. This improves fracture toughness and mechanical reliability, making CeO₂ highly valuable for dental crowns and high-performance structural ceramic applications.
Q: Why is oxalate preferred over nitrate for cerium separation?
A: Oxalate precipitation offers higher selectivity for Ce³+ and lower sodium contamination, critical for producing high-purity cerium compounds for electronics.
Q: What is the optimal calcination atmosphere for forming CeO₂?
A: Heating in air at 600°C for 2 hours ensures complete conversion to CeO₂ with minimal Ce³+ residual (<1%), suitable for catalytic applications.
Q: Can it be used in aqueous-based synthesis without calcination?
A: Yes, when dissolved in nitric acid, it provides a clear Ce³+ solution for co-precipitation with other rare-earth oxalates to create multi-element oxide powders.
Q: How does humidity affect storage stability?
A: Store in airtight containers with desiccants; prolonged exposure to >60% RH may cause slight hydration layer growth but does not impact chemical reactivity.
Q: Is this product compliant with ISO 13485 for medical device applications?
A: Yes, 4N-grade products undergo additional biocompatibility testing, with heavy metal levels far below allowable limits for dental and surgical ceramics.
