GOALI: Metal alloy powders via co-solvent assisted spray pyrolysis

GOALI：通过共溶剂辅助喷雾热解制备金属合金粉末

• 批准号: 0755703
• 负责人: Sheryl Ehrman
• 金额: $ 33万
• 依托单位: University of Maryland, College Park
• 依托单位国家: 美国
• 项目类别: Continuing Grant
• 财政年份: 2008
• 资助国家: 美国
• 起止时间: 2008-04-01 至 2012-03-31
• 项目状态: 已结题
• 来源: https://www.nsf.gov/awardsearch/showAward?AWD_ID=0755703&HistoricalAwards=false
• 关键词: GOALI; Metal; alloy; powders; via

CBET-0755703, EhrmanProject Summary: The objective of this project is to develop a spray pyrolysis process for the production of metal alloy microparticles from inexpensive metal salt precursors.A team consisting of student, faculty and industrial researchers from DuPont and theUniversity of Maryland will conduct experimental and simulation based studies in order to develop a comprehensive understanding of relationship between process conditions and product characteristics.Intellectual Merit: Spray pyrolysis processes offer many advantages over solution phase routes for powder production, but extension to metals on an industrial scale has been restricted to only a few oxidation resistant systems such as silver and palladium. The requirement of addition of high concentrations of reducing gas to produce metallic particles has limited extension to base metal production. In our approach, the cosolvent decomposes in the reactor to produce small amounts of hydrogen, less than the flammability limit in air, reducing metal salt crystals to metallic powders. The process is governed by both kinetic and thermodynamic constraints. Chemical kinetic modeling of the decomposition process will be used to predict hydrogen evolution while thermochemical modeling to determine equilibrium phase relationships as a function of oxygen concentration and temperature will be used, together with a mass and energy balance based process model, and statistical based quality control concepts to guide process design. With this project, the team will take the process from bench scale single component proof of concept stage to multicomponent alloy powder formation, including process scale up and applications testing.Broader Impact: The target application is thick film conductive pastes used in the production of microcircuit materials, for example in hybrid integrated circuitry, embedded passives to enable shrinkage of components and metallization of multilayer ceramic capacitors. End products containing microcircuit materials are ubiquitous, ranging from cell phones to solar cells to automobiles. Better quality materials will lead to improved communications and safety, greater energy efficiency, and other improvements affecting quality of life. Aerosol-based production routes, which are rapid and often single step, and which produce solvent and ligand free product powders, also present a general opportunity for promotion of sustainability in manufacturing. Beyond electronic materials, metal powders are of interest for dental and medical implant applications as well as medical devices such as in glucose monitors for diabetics, and thus results from this research may impact these industries as well. Elements of the value added by the proposed industry-university collaboration include: (1) fusion of fundamental principles of reaction engineering, aerosol technology and materials science with industrial process development and scale up activities, and (2) interactions between industry and university researchers and students that will allow participation at all stages from laboratory innovation to applications testing and extension of the research to inform teaching and outreach activities with a real world perspective.

CBET-0755703, EhrmanProject Summary: The objective of this project is to develop a spray pyrolysis process for the production of metal alloy microparticles from inexpensive metal salt precursors.A team consisting of student, faculty and industrial researchers from DuPont and theUniversity of Maryland will conduct experimental and simulation based studies in order to develop a comprehensive understanding of relationship between process conditions and product characteristics.Intellectual优点：喷雾热解过程在粉末生产的溶液相位路线上具有许多优势，但是在工业规模上向金属扩展仅限于仅几个耐氧化系统，例如银和钯。 添加高浓度的减少气体以产生金属颗粒的要求有限扩展到碱金属产量。在我们的方法中，助体化合物在反应堆中分解以产生少量的氢，小于空气中的易燃性极限，将金属盐晶体降低到金属粉末。该过程受动力学和热力学约束。分解过程的化学动力学建模将用于预测氢的演化，而热化学建模将使用氧气浓度和温度的函数，以及基于质量和能量平衡的过程模型，以及基于统计的质量控制概念来指导过程设计。有了这个项目，团队将从基准尺度单一组件概念阶段进行该过程到多组分合金粉末的形成，包括流程量表和应用测试。BRODER的影响：目标应用是用于生产微电路材料的较厚的膜导电糊，例如在混合集成电路中，嵌入了嵌入式式ceric ceric caponers and Metallialials of Metallialials of Metallializations of Metallializations in Metallializations of Metallializations。含有微电路材料的最终产品无处不在，从手机到太阳能电池再到汽车。更好的质量材料将改善通信和安全性，提高能源效率以及其他影响生活质量的改进。基于气雾剂的生产路线是快速且通常是单一步骤，并且产生溶剂和配体无产品粉末，也为促进制造业可持续性提供了一般的机会。除了电子材料之外，金属粉末对牙科和医疗植入物应用以及诸如糖尿病患者葡萄糖监测器等医疗设备都很感兴趣，因此这项研究的结果也可能影响这些行业。拟议的行业 - 大学合作构建的增值要素包括：（1）融合反应工程，气溶胶技术和材料科学与工业流程开发和扩大活动的基本原理，以及（2）工业与大学研究人员之间的互动，这些互动将允许参与实验室创新和扩展研究的各个阶段，以了解研究和扩展的研究，以了解研究和扩展的研究，以了解研究和扩展研究的现实世界，以实现领域的研究。