Fluidized Bed Surface Modification of Fine Powders

9362136 Sherman用于生产先进材料的一种重要粉末是粒度细小（小于30微米，对应于Geldart C级粉末），具有粘性且难以流化。在高温下通过流化对这些粉末进行涂层或表面改性可能会产生不希望的硬团块。在高于输运极限（快速流化）或湍流流化区域操作流化床，可以使C类粉末流化，产品产量高。在该项目的第一阶段，Ultrament将展示使用快速流化或湍流流化床将涂层应用于细颗粒和晶须的可行性。这将允许生产改进的粉末冶金，陶瓷和复合材料的起始材料，以及改进的导电填料，增强剂和电子材料。* * *

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. ***