Controlled Production of Ultrafine Particles Using Microemulsion and Ceramic Synthesis Technologies

提出了一种控制合成窄尺寸分布超细颗粒的方法。微粒在含有两种试剂的微乳液溶液的快速混合过程中成核，其中一种试剂过量相当多。在中空纤维膜组件中，通过透析将限制剂添加到微乳液中，控制了颗粒的生长。然后，通过旋涂技术将颗粒分散在薄玻璃薄膜中，并在薄膜致密化之前重新结晶。线性和非线性光学技术，以及外场相关测量被用于量子晶体的光学表征。基于详细布居平衡的微乳液体系输运和反应过程的理论分析我们会进行考虑。将建立粒子在冷热处理过程中和在薄膜中的再结晶模型。预计该项目将导致开发新的细粒加工技术，通过微乳液路线合成均匀的粒子。

It is proposed to investigate an approach to the controlled synthesis of ultrafine particles of narrow size distribution. Particles are nucleated during the rapid mixing of microemulsion solutions containing the two reagents, one in considerable excess. The particle growth is controlled by the addition of the limiting reagent to the microemulsion via dialysis in a hollow fibre membrane module. Then, the particles are dispersed in thin glass films cast via spin-coating techniques, and recrystallized before densification of the film. Linear and nonlinear optical techniques, and external field dependent measurements are used for optical characterization of the quantum crystallites. A theoretical analysis of the transport and reaction processes in the microemulsion system based on detailed population balance considerations will be carried out. Models for the recrystallization of the particles, both during lyothermal processing and in thin films, will be developed. Itis expected that the project will lead to the development of new processing technologies for fine, uniform particle synthesis via the microemulsion based route.