Fumed silica a seemingly inconspicuous white powder, is one of the highly valuable functional materials in modern industry. It is generated by the hydrolysis of silane at high temperatures, with particle diameters only in the nanometer range, possessing an extremely large specific surface area and high dispersibility. Therefore, this material is not only widely used, but also demonstrates irreplaceable roles in many fields. Firstly, due to its excellent thickening and thixotropic properties, fumed silica has become an ideal additive for the coatings, adhesives, and paint industries. It can effectively improve the viscosity and stability of the product, prevent sedimentation and delamination from occurring. For example, adding fumed silica to coatings can significantly enhance construction performance, make coatings more uniform, and extend storage life. In addition, this material is also a star ingredient in the cosmetics and pharmaceutical industries. Due to its extremely small particles and loose structure, fumed silica can serve as a high-quality flowable agent to help improve the uniformity of powdered cosmetics while reducing clumping issues. In the pharmaceutical industry, the hydrophobic properties of fumed silica are also widely used to adsorb water, thereby protecting the stability of drugs. In the field of electronics, fumed silica also performs well. It has excellent insulation performance and can be used as a filling material in the manufacturing of high-precision electronic components, helping to achieve higher thermal conductivity and stability requirements. In addition, its chemical inertness makes it a preferred additive for sealants and silicone rubber, helping to extend the product's lifespan and improve its high temperature resistance. It is worth mentioning that gas-phase silica also plays an important role in the field of environmental protection. For example, it can be used in the production of defoamers to effectively control foam problems and improve industrial production efficiency. In addition, its nanoscale structure enables it to perform excellently in filtering materials, providing efficient solutions for water treatment and air purification. Overall, gas-phase silica has become an indispensable material in multiple industries due to its multifunctionality and excellent performance. From industry to consumer goods, its applications are ubiquitous and have unlimited potential for the future. It is this tiny powder that supports every aspect of modern technology and life.