Chemical composition
Firstly, we need to clarify that white carbon black and silicon dioxide have the same chemical composition, and their chemical formula is SiO ₂. White carbon black is actually a specific form of silica, and its composition can be represented by SiO2 · nH2O, where nH2O exists in the form of surface hydroxyl groups.
Appearance and properties
In terms of appearance and properties, white carbon black and silica are also different. The appearance of silica is amorphous white powder, non-toxic, odorless, and pollution-free. Its microstructure is spherical, flocculent, and network like, insoluble in water. The appearance of white carbon black, on the other hand, is white powder, granular or irregularly shaped, soluble in caustic soda and hydrofluoric acid, insoluble in water, solvents, and acids (excluding hydrofluoric acid), and has the characteristics of high temperature resistance, non flammability, odorless, odorless, and good electrical insulation.
application area
In terms of application, white carbon black and silica also have their own characteristics. Silicon dioxide is an important raw material widely used in the manufacturing of glass, quartz glass, sodium silicate, optical fibers, important components of the electronic industry, optical instruments, handicrafts, and refractory materials. White carbon black is widely used in rubber products, agricultural chemicals, daily chemical products, plastics, coatings, resin composites, and paper fillers. In addition, white carbon black has been widely used as a substitute for carbon black in rubber products.
Preparation method
In terms of preparation methods, white carbon black and silica are also different. White carbon black can be prepared by precipitation or gas-phase methods, and the different preparation methods result in two different products with the same molecular formula.
Performance characteristics
In terms of performance characteristics, there are also differences between white carbon black and silica. White carbon black is a porous substance, with aggregate morphology and microstructure similar to carbon black. Nano silica, on the other hand, is a non-toxic, odorless, and pollution-free white inorganic non-metallic material with a small particle size (0-100nm) and a large specific surface area. It has extremely strong reflection characteristics for ultraviolet, infrared, and visible light. The volume effect and quantum tunneling effect of nano silica cause it to have a percolation effect, which can form a spatial network structure with organic molecular compounds, greatly improving the mechanical strength, toughness, wear resistance, and aging resistance of polymer materials.
In summary, although white carbon black and silica have the same chemical composition, they differ in appearance, properties, application areas, and preparation methods.