RUI: Magnetic Studies of Carbon Encapsulated Nanoparticles

RUI：碳封装纳米粒子的磁性研究

• 批准号: 9706870
• 负责人: Kiumars Parvin
• 金额: $ 21.4万
• 依托单位: San Jose State University Foundation
• 依托单位国家: 美国
• 项目类别: Continuing Grant
• 财政年份: 1997
• 资助国家: 美国
• 起止时间: 1997-08-01 至 2001-07-31
• 项目状态: 已结题
• 来源: https://www.nsf.gov/awardsearch/showAward?AWD_ID=9706870&HistoricalAwards=false
• 关键词: RUI; Magnetic; Studies; Carbon; Encapsulated

9706870 Parvin This project explores the magnetic behavior of carbon- encapsulated magnetic particles. The research involves synthesis, purification, magnetic extraction, and structural and magnetic characterization of the particles. The magnetic particles (carbon-coated alloys of iron-transition metals, cobalt-transition metals, nickel-transition metals and iron-rich rare earths)are synthesized in a modified low carbon:metal ratio fullerene arc chamber in which the formation of carbides are minimized. Characterization of the particles includes particle size distribution analysis and composition, structural analysis using transmission electron microscopy and X-ray diffraction, and Mossbauer spectroscopy. Hysteritic and temperature-dependent magnetic response is measured over a wide range of magnetic fields and temperatures. It is a collaborative project between San Jose State University (particle characterization) and Northwestern University (particle synthesis). %%% Carbon-encapsulated magnetic particles are of interest because they combine corrosion protection from the carbon coating and possible unique magnetic properties based on the type of metal alloy encapsulated. ***

9706870 Parvin本项目探索碳包覆磁性颗粒的磁性行为。研究内容包括合成、提纯、磁性提取以及颗粒的结构和磁性表征。磁性颗粒(铁过渡金属、钴过渡金属、镍过渡金属和富铁稀土的碳包覆合金)是在改进的低碳金属比富勒烯电弧室中合成的，在该电弧室中碳化物的生成最少。颗粒的表征包括颗粒大小分布分析和组成，使用透射电子显微镜和X射线衍射进行结构分析，以及穆斯堡尔谱。在各种磁场和温度范围内测量磁滞回线和随温度变化的磁响应。这是圣何塞州立大学(粒子表征)和西北大学(粒子合成)的合作项目。%碳包覆的磁性颗粒之所以令人感兴趣，是因为它们结合了碳涂层的防腐保护和基于所包封的金属合金类型的可能的独特磁性。***