What is cerium oxide?
Cerium oxide is an inorganic substance with the chemical formula CeO2, light yellow or yellow-brown helper powder. Density 7.13g/cm3, melting point 2397℃, insoluble in water and alkali, slightly soluble in acid. In 2000 ℃ temperature and 15MPa pressure, available hydrogen reduction of cerium oxide to get cerium trioxide, temperature free in 2000 ℃ between, pressure-free in 5MPa pressure, cerium oxide is slightly yellow slightly red, and pink, its performance is to do polishing materials, catalysts, catalyst carriers (additives), ultraviolet absorbers, fuel cell electrolyte, automotive exhaust gas absorbers, electronic ceramics, etc.
Characteristics of cerium oxide
The pure product is white heavy powder or cubic crystal, and the impure product is light yellow or even pink to reddish brown (due to the presence of traces of lanthanum, praseodymium, etc.). Almost insoluble in water and acid. Relative density 7.3. Melting point 1950℃, boiling point: 3500℃. Toxic, LD50 (rat, oral) about 1g/kg. The salt of cerium oxide rare earth elements can reduce the content of prothrombin, make it inactivate, and inhibit the production of coagulation activator, make fibrinogen precipitate, catalyze the decomposition of phosphate compounds, the toxicity of rare earth elements decreases with the increase of atomic weight.
Polishing mechanism of cerium oxide
The hardness of CeO2 particles is not high, as shown in the table below, the hardness of cerium oxide is much lower than diamond and alumina, also lower than zirconia and silicon oxide, and comparable to ferric oxide. Therefore, from the mechanical aspect only, it is not technically feasible to polish materials based on silicon oxides, such as silicate glass and quartz glass, with low hardness cerium oxide. But cerium oxide is currently the polishing powder of choice for polishing silicon oxide-based materials and even silicon nitride materials. It can be seen that cerium oxide polishing also has a mechanical role in addition to other roles. Commonly used grinding, polishing material hard material diamond in CeO2 lattice usually appear oxygen vacancies make its physical and chemical properties change, and polishing performance has a certain impact. Commonly used cerium oxide polishing powder contains a certain amount of other rare earth oxides, praseodymium oxide is also a face-centered cubic lattice structure, and can be suitable for polishing, while other lanthanide rare earth oxides have no polishing ability, they can be formed in a certain range of solid solution with the CeO2 crystal structure under the condition of not changing the CeO2. For high-purity nano cerium oxide polishing powder, the higher the purity of cerium oxide, the greater the polishing capacity and increased service life, especially for long-time cycle polishing of hard glass and quartz optical lenses, etc., it is appropriate to use high-purity cerium oxide polishing powder.
Application of cerium oxide polishing powder:
Cerium oxide is an oxidizer. The catalyst for organic reactions. Steel analysis as rare earth metal specimens. Redox titration analysis. Decolorization glass. Glass enamel shading agent. Heat-resistant alloys. Used as an additive in the glass industry, as plate glass grinding material, and also used in cosmetics as an anti-UV effect. Has been extended to the grinding of glasses glass, optical lenses, and picture tubes, which play a role in the decolorization, clarification, and UV and electron ray absorption of glass.
Cerium oxide polishing powder, mainly used in the polishing of glass products, its main applications in the following areas:
1. polishing of eyeglasses, and glass lenses;
2. optical lenses, optical glass, lenses, etc;
3. cell phone screen glass, hand surface (table door), etc;
4. liquid crystal display all kinds of liquid crystal screen;
5. rhinestones, hot diamonds (hair cards, diamonds on jeans), lamp ornamental balls (luxury chandeliers in large halls);
6. Crystal crafts;
7. part of the jade polishing
Cerium oxide powder supplier
Luoyang Tongrun Nano Technology Co. Ltd. (TRUNNANO) Luoyang City, Henan Province, China, is a reliable and high-quality global chemical material supplier and manufacturer. It has more than 12 years of experience providing ultra-high quality chemicals and nanotechnology materials, including Zinc sulfide, nitride powder, Zinc sulfide powder, sulfide powder, and 3D printing powder. If you are looking for high-quality and cost-effective
Cerium oxide powder, you are welcome to contact us or inquire at any time.
