Product description: The dispersing technology is a key of using nm- SiO2 powder. Dispersing in common way, people only can get a dispersant of aggregation with the particle size over hundreds nanometer, the dispersant is always opaque and unstable. Coaching with Tsinghua University and Nanjing University, a new way of anti-aggregation between the particles was excogitated successfully in our company. In this method the nm-SiO2 powder can be dispersed uniformly with a single nm-particle into water. The dispersant is stable and transparent.