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.

这个小型企业技术转移阶段I项目将应用新颖的原子层沉积（ALD）技术，以封装在某些高级材料中用于航空航天应用和药物输送的超细颗粒表面。超铁大小的铁颗粒将用氧化铝提供50、25、12.5、6.3、3.2、1.6和0.8纳米的薄膜厚度。粒子纳米含量将在科罗拉多大学开发的流化床过程中进行。产生的颗粒将以薄膜厚度，粒度分布，表面积和膜覆盖率均匀为特征。将评估它们的胁迫性，远期磁化，磁滞损失和氧化耐药性。将制造纳米化铁颗粒填充的环氧复合材料并测试电磁传输/反射。 在商业上，这种功能强大且用途广泛的加工方法可以用陶瓷纳米层封装超细颗粒，以相对于更常规的方法提供无与伦比的涂层厚度（0.1 nm）的控制。这种超薄，化学键合的单个主要颗粒上的保形涂层提供了从未意识到的材料机会。设想的应用包括用于微波镜头天线的人工介电的新型铁磁材料，雷达交叉还原材料和药物输送。