STTR Phase I: Novel Nanocoated Ferromagnetic Materials

STTR 第一阶段：新型纳米涂层铁磁材料

• 批准号: 0232515
• 负责人: Karen Buechler
• 金额: $ 10万
• 依托单位: ALD NANOSOLUTIONS, INC.
• 依托单位国家: 美国
• 项目类别: Standard Grant
• 财政年份: 2003
• 资助国家: 美国
• 起止时间: 2003-01-01 至 2003-12-31
• 项目状态: 已结题
• 来源: https://www.nsf.gov/awardsearch/showAward?AWD_ID=0232515&HistoricalAwards=false
• 关键词: STTR; Phase; Novel; Nanocoated; Ferromagnetic

This Small Business Technology Transfer Phase I project will apply novel Atomic Layer Deposition (ALD) technology for the encapsulating of ultrafine particle surfaces used in certain advanced materials for aerospace applications and drug delivery. Ultrafine sized iron particles will be nanocoated with alumina providing film thicknesses of 50, 25, 12.5, 6.3, 3.2, 1.6, and 0.8 nanometers. The particle nanocoating will be carried out in a fluidized bed process developed at the University of Colorado. The produced particles will be characterized for film thickness, particle size distribution, surface area, and film coverage uniformity. They will be evaluated for coercivity, remanent magnetization, hysteresis loss, and oxidation resistance. Nanocoated iron particle filled epoxy composites will be fabricated and tested for electromagnetic transmission/reflection. Commercially, this powerful and versatile processing method can encapsulate ultrafine particles with ceramic nanolayers to offer unparalleled control of coating thickness ( 0.1 nm) relative to more conventional methods. Such ultrathin, chemically bonded, conformal coatings on individual primary particles provide for materials opportunities never before realized . Envisioned applications include novel ferromagnetic materials for artificial dielectrics for microwave lens antennas, radar crossection reduction materials, and drug delivery.

该小企业技术转让第一阶段项目将应用新型原子层沉积（ALD）技术，用于封装用于航空航天应用和药物输送的某些先进材料中的超细颗粒表面。超细尺寸的铁颗粒将用氧化铝纳米涂覆，提供50、25、12.5、6.3、3.2、1.6和0.8纳米的膜厚度。颗粒纳米涂层将在科罗拉多大学开发的流化床工艺中进行。将表征所产生的颗粒的膜厚度、粒度分布、表面积和膜覆盖均匀性。将对它们的磁化率、剩磁、磁滞损耗和抗氧化性进行评价。纳米涂层的铁颗粒填充环氧树脂复合材料将被制造和测试的电磁传输/反射。 在商业上，这种强大而通用的加工方法可以用陶瓷纳米层封装超细颗粒，相对于更传统的方法，提供无与伦比的涂层厚度控制（0.1 nm）。在单独的初级颗粒上的这种化学键合的保形涂层提供了以前从未实现的材料机会。设想的应用包括用于微波透镜天线、雷达截面减小材料和药物递送的人工屏蔽的新型铁磁材料。