Gas phase white carbon black (particle size 5-50 nm) has become a "nanoscale performance enhancer" in semiconductor, aerospace and other fields due to its ultra-high purity (>99.8%) and ultra-high specific surface area (300-400 m ²/g). Its preparation adopts the high-temperature hydrolysis process of silicon tetrachloride, with a reaction temperature of 1800 ℃. The generated aerosol is refined through 15 processes including multi-stage separation and surface treatment.


In the field of electronic packaging, the thermal conductivity of epoxy resin filled with gas-phase white carbon black has increased from 0.2 W/m · K to 1.5 W/m · K, meeting the heat dissipation requirements of 5G base stations; In aerospace coatings, its refractive index (1.457) matches the resin, achieving a balance between stealth coating and weather resistance.


However, the global supply of silicon tetrachloride is concentrated in a few enterprises such as Germany's Evonik and China's Hesheng Silicon Industry, and the shortage of raw materials restricts capacity expansion. Domestic enterprises have achieved a 40% reduction in the cost of gas-phase white carbon black through the development of by-product recovery technology for ferrosilicon alloy, promoting its large-scale application in fields such as new energy vehicle battery separators and ultra-high voltage insulators.