An Overview of Precipitated Silica (White Carbon Black): Production, Properties, and Applications

Precipitated silica, commonly known as white carbon black, is a synthetic amorphous silica produced via precipitation from sodium silicate solutions. Its high surface area, porosity, and chemical inertness make it indispensable in industries such as rubber, coatings, and food. In tire manufacturing, it enhances tread wear resistance and reduces rolling resistance, improving fuel efficiency. As a reinforcing filler, it outperforms carbon black in certain applications due to its transparency and UV stability. The production process involves acidification of sodium silicate, followed by washing, filtration, and drying. Future trends focus on sustainable synthesis methods and nanoscale modifications to expand its use in high-performance composites.