Fluidized Bed Surface Modification of Fine Powders

细粉的流化床表面改性

• 批准号: 9362136
• 负责人: Andrew Sherman
• 金额: $ 6.5万
• 依托单位: ULTRAMET, INC.
• 依托单位国家: 美国
• 项目类别: Standard Grant
• 财政年份: 1994
• 资助国家: 美国
• 起止时间: 1994-01-15 至 1994-09-30
• 项目状态: 已结题
• 来源: https://www.nsf.gov/awardsearch/showAward?AWD_ID=9362136&HistoricalAwards=false
• 关键词: Fluidized; Bed; Surface; Modification; Fine

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. ***

小谢尔曼9362136 用于生产先进材料的一种重要的粉末具有细尺寸（小于30微米，对应于GeldartC类粉末），具有粘性并且难以粉碎。 通过在高温下流化对这些粉末施加涂层或表面改性可产生不期望的硬附聚物。 在高于输送极限（快速流化）或在湍流流化区中操作流化床可以使C类粉末以高产物产率流化。 在该项目的第一阶段，Ultrament将展示使用快速流化床或湍流流化床对细颗粒和晶须进行涂层的可行性。 这将允许生产用于粉末冶金、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。 ***