The preparation technology of silica has evolved from traditional precipitation method to modern vapor phase method, sol gel method and other methods. Each technology has its unique advantages and application scenarios, which together promote the rapid development of silica industry.


Precipitation method: As the most traditional preparation method, precipitation method generates precipitation by reacting sodium silicate with acid, and then obtains white carbon black through washing, drying, crushing and other steps. This method has readily available raw materials and low cost, but the purity of the product is relatively low, making it suitable for fields that do not require high performance.


Gas phase method: The gas phase method uses silicon tetrachloride to react with hydrogen and oxygen at high temperatures to generate silicon dioxide gas, which then condenses into ultrafine particles during the cooling process. The white carbon black produced by this method has high purity, small particle size, and large specific surface area, and is widely used in high-end rubber, plastic, and electronic materials fields.


Sol gel method: the sol gel method forms a stable sol system by controlling the hydrolysis and polycondensation of silicon source, and then obtains white carbon black through gel, drying and calcination. This method can accurately control the pore structure and surface properties of the product, providing the possibility for preparing specific functional white carbon black.


With the continuous advancement of technology, the preparation technology of white carbon black is developing towards a more efficient, environmentally friendly, and intelligent direction, laying a solid foundation for the sustainable development of the white carbon black industry.
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