Use of Microemulsions in the Formation and Characterization of Ultrafine Magnetic Oxide Particles (Expedited Award)

本课题涉及超细粉体的形成和表征 磁性氧化物颗粒，使用微乳液。 微乳液是 水和油的热稳定各向同性分散体 由表面活性剂稳定。 这样的系统包括100-1000埃 分散的液滴。 这种微乳液中的反应可以是 用于生产氧化铁的超细颗粒。 与 溶解在分散液滴中的前体物质， 以及这些液滴的融合以及随后的 初级颗粒导致超细颗粒的形成。 以前对这种水滴的聚结和融合的研究 在微乳液中已经揭示了这种聚结可以被促进或 通过使用各种添加剂来延缓。 调查人员已 产生了50-500埃的AgCl颗粒， 与摄影技术的关系。

This project involves the formation and characteriaztion of ultrafine magnetic oxide particles using microemulsions. Microemulsions are thermodynamically stable isotropic dispersions of water and oil stabilized by surfactants. Such systems consist of 100-1000 Angstrom dispersed droplets. The reactions in such microemulsions can be utilized to produce ultrafine particles of iron oxide. With the precursor species solubilized in the dispersed droplets, the sollisions and fusion of such droplets as well as the subsequent coagulation of primary particles result in the formation of ultrafine particles. Previous research on the coalenscence and fusion of such water droplets in microemulsions has revealed that such coalescence can be promoted or retarded by the use of various additives. The investigators have produced 50-500 Angstrom AgCl particles that have an important relationship to photographic technology.