Fluidized Bed Surface Modification of Fine Powders

9362136谢尔曼粉末是生产先进材料的一种重要粉末，具有细小的粒度(小于30微米，相当于Geldart C级粉末)，具有粘聚性，不易流态化。使用涂料或通过高温流态化对这些粉末进行表面改性可能会产生不希望看到的硬团聚。在高于输送极限(快速流态化)或在湍流流态化区域运行的流态化床可使C级粉末以高产品产率进行流态化。在该项目的第一阶段，Ultrament将展示使用快速流态化或湍流流态化将涂层应用于细颗粒和晶须的可行性。这将允许生产粉末冶金、陶瓷和复合材料的改进的起始材料，以及改进的导电填料、增强材料和电子材料。***

9362136 Sherman An important kind of powders for producing advanced materials are of a fine size (less than 30 microns, corresponding to Geldart class C powders) cohesive and difficult to fluidize. Applications of coatings or surface modifications of these powders by fluidization at elevated temperature may produce undesirable hard agglomerates. Operating a fluidized bed above transport limit (fast fluidization) or in the turbulent fluidization region may enable class C powders, to be fluidized with high product yields. In this Phase I of the project, Ultrament will demonstrate the feasibility of using a fast-fluidized or turbulent fluidized bed for the application of coatings to fine particles and whiskers. This will allow the production of improved starting materials for powder metallurgy, ceramic, and composite materials, as well as improved conductive fillers, reinforcements, and electronic materials. ***