文摘
A droplet micro-reactor was developed to realize the internal sol–gel reaction of ZrO<sub>2sub> inside the droplet. The reactants are only allowed to combine when the droplet forms, meanwhile, they are able to mix well and react to form gel particles with a proper designed structure of the micro-reactor. In this condition, the mixing efficiency was determined by the structure of the micro-reactor and the flow rate ratio of the two components. After sintering, ZrO<sub>2sub> ceramic microspheres are acquired with high sphericity and narrow size distribution. This droplet micro-reactor overcomes the gelation of the premixed sol and reactant in the channel, and it has been demonstrated to be more stable with a longer running time.