| Certification: | ISO |
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| Shape: | Block |
| Purification Method: | Vacuum Distillation |
| Preparation Method: | Metallothermic Reductio |
| Application: | Energy Materials, Photoelectric Material, Photorecording Material, Computer |
| Product Type: | Rare Earth Metal |
| Samples: |
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| Customization: |
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Audited Supplier Gray and lively metal, density: 6.9g/cm3 (square crystal), 6.7g/cm3 (hexagonal crystal), melting point: 795 ºC, boiling point: 3443 ºC, malleable. It is one of the most abundant naturally occurring lanthanide metals. Bending cerium strips often sputters sparks.
Cerium is easily oxidized at room temperature and loses its luster in the air. It can burn in the air by scraping it with a knife (pure cerium is not easy to spontaneously combust, but when it is slightly oxidized or alloyed with iron, it is extremely easy to spontaneously combust). When heated, it burns in air to form ceria. It can react with boiling water to produce cerium hydroxide, which is soluble in acid but insoluble in alkali. Cerium can also burn in halogens, such as chlorine, to produce cerium trichloride (CeCl3): . When subjected to low temperatures and high pressures, a diamagnetic body emerges that is 18 percent denser than the normal form of cerium. For the manufacture of flint, ceramics and alloys. Cerium is the most active of the rare earth elements except europium. Cerium reacts slowly in cold water and accelerates in hot water.
Application field
1. Used as reducing agent and catalyst.
2. It is used as an alloy additive, and used in the production of cerium salts, etc. It is also used in medicine, leather, glass, textile and other industries.
3. Cerium can be used as catalyst, arc electrode, special glass, etc. Cerium alloys are resistant to high heat and can be used to make parts for jet propulsion.
Environmentally friendly materials
Cerium is also used as an excellent environmental protection material, and the most representative application is a catalyst for automobile exhaust purification. Adding cerium to the commonly used three-way catalysts of precious metals (platinum, rhodium, palladium, etc.) can improve catalyst performance and reduce the amount of precious metals. The main pollutants in automobile exhaust are carbon monoxide, hydrocarbons and nitrogen oxides, which will affect human hematopoiesis. function, form photochemical toxic fumes and produce carcinogens, causing damage to humans, animals and plants. The three-way purification catalytic technology can fully oxidize hydrocarbons and carbon monoxide to generate carbon dioxide and water, and decompose nitrogen oxides into nitrogen and oxygen (hence the name three-way catalysis). Precious metals such as platinum, rhodium and palladium are excellent catalytic materials for exhaust gas purification. However, they are expensive and have high requirements on engines and gasoline, which limit their wide application. Adding cerium to the catalyst can significantly reduce the amount of precious metals and improve the catalytic performance, which greatly reduces the price of the catalyst. In the United States, automobile exhaust purification catalysts have become the largest user of rare earth consumption. Cerium oxide can also be used as a photocatalyst with nano-titanium oxide, which is used in antibacterial ceramics and oxygen-rich ion environmental protection coatings.
Hazardous metal replacement
Cerium sulfide can replace lead, cadmium and other metals that are harmful to the environment and humans as a plastic red colorant, and can also be used in industries such as paint, ink and paper. The French Rhodia company masters the leading technology. Organic compounds such as cerium-rich light rare earth naphthenate are also used in paint driers, PVC plastic stabilizers and MC nylon modifiers, which can not only replace lead salts and other highly toxic substances, but also reduce diamond salts, etc. expensive material.
special functional materials
Cerium is also used to make many special functional materials, such as fluorescent grade cerium oxide used to make green powder of trichromatic phosphors for lamps; the solid-state laser of the CeLiSAF laser system developed in the United States can be used to detect biological weapons by monitoring the concentration of tryptophan. Can also be used in medicine. Metal cerium can be used to manufacture cerium diamond copper iron permanent magnet materials; cerium pigeon electrodes can replace radioactive thorium pigeon electrodes.
Plant Growth Regulator
Cerium-based light rare earths as plant growth regulators can improve crop quality, increase yield and improve crop stress resistance. Used as a feed additive, it can improve the egg production rate of poultry and the survival rate of fish and shrimp farming, and also improve the wool quality of long-wool sheep. Cerium is a low-toxic substance, and a rare earth monograph in the United States says that feeding experiments on mice show that the oral toxicity of cerium-rich light rare earth oxides is comparable to that of oral salt. So far, endemic diseases caused by rare earths have not been found in rare earth rich ore areas. Through a large number of experimental studies, Chinese scientists believe that the agricultural use of rare earths will not cause environmental pollution and will not harm the survival of humans and animals.
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