The unique "three-dimensional dendritic" structure of gaseous silica


In the production process of vapour silica, halosilane is first hydrolyzed and condensed into a single silica Particle. It then gradually grows into a 7-40 nm spherical particle called the "Primary Particle" of silica. The "primary particles" continue to move forward in the direction of the flame in the reactor and collide with each other. Due to the relatively high temperature in the reactor, the particles are still close to a melting state. After the collision, the particles are fused to form a three-dimensional dendritic structure of particles connected by several spherical particles. An Aggregate Particle called silicon dioxide. Because the particles in aggregates are combined, they are stable structures that are almost impossible to separate. Silica "aggregate" in the pipeline along with the airflow, continues to move forward, collide, and then connect, forming fluffy flocculent powder called silica "Agglomerate Particle". Due to the low temperature in the pipe at this time, the connections between the "aggregates" are only connected by physical adsorption, which is an unstable structure and is separable (dispersible) under a specific mechanical force. There are apparent differences in the dispersion state between the two. It is precise because the vapour phase silica dispersed in the system can form a "nearly perfect" three-dimensional network structure of nanoparticles, making it have excellent reinforcement performance, thickening, thixotropic, anti-settlement, discharge hanging and so on. If you are looking for high quality, high purity and cost-effective Fumed silica, or if you require the latest price of Fumed silica, please feel free to email contact mis-asia.

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