Amorphous silica is a type of silica that lacks a crystal structure and thus does not possess a well-defined shape. It is composed mainly of silicon dioxide (SiO2) but in a non-crystalline or disordered form. Unlike crystalline silica, which is made up of repeating patterns of atoms, amorphous silica has a more random and disorganized arrangement of its molecular structure.
Amorphous silica can be found in various forms, including powders, gels, and colloidal suspensions. It is commonly used in a range of industrial applications due to its unique properties. It possesses high thermal stability, chemical inertness, and a large surface area, making it highly desirable for numerous applications.
In industries, amorphous silica is widely used as a filler or reinforcing agent in rubber, plastics, adhesives, and coatings. It is also a key ingredient in the production of glass and ceramics, where its high melting point and hardness contribute to the desired material properties. Furthermore, amorphous silica finds applications as a catalyst support, desiccant, and absorbent due to its porosity and affinity for adsorbing impurities.
While amorphous silica is generally considered safe for commercial use, prolonged exposure to extremely fine particles of amorphous silica can pose health risks, potentially leading to respiratory issues such as silicosis. Consequently, effective occupational health and safety measures are necessary when handling and working with amorphous silica to minimize any potential risks.
