GOALI/Collaborative: Impact of Mixed Network Formers on the Structure and Properties of Oxide Glasses

GOALI/协作：混合网络形成剂对氧化物玻璃结构和性能的影响

• 批准号: 1105219
• 负责人: Jincheng Du
• 金额: $ 36.37万
• 依托单位: University of North Texas
• 依托单位国家: 美国
• 项目类别: Standard Grant
• 财政年份: 2011
• 资助国家: 美国
• 起止时间: 2011-09-15 至 2017-08-31
• 项目状态: 已结题
• 来源: https://www.nsf.gov/awardsearch/showAward?AWD_ID=1105219&HistoricalAwards=false
• 关键词: GOALI; Collaborative; Impact; Mixed; Network

NON-TECHNICAL DESCRIPTION: An accurate knowledge of the microscopic structure of glass is critical for enabling future breakthroughs in glass science and technology; this progress is impeded by the inherent structural complexity of glass, particularly in practical multicomponent glass systems of industrial interest. As glass research enters a new decade, addressing technological challenges requires an unprecedented knowledge of structure-property relationships of glasses and the impact of slight compositional variations on the resulting macroscopic properties. In this project, an integrated experimental and theoretical approach builds a comprehensive, unified view of the microscopic physics of glass and its relationship to the macroscopic properties of technological importance. This integration starts with the development of models for interatomic potentials, where experiments provide structural and property data that are being used during the parameters fitting process. Building reliable and validated potentials enables the design of glass compositions with realistic processing conditions for new applications of technological importance. This integrated approach is dramatically changing the route of glass research and is starting a new paradigm for designing new glass compositions based on computation, rather than just traditional empirical approaches.TECHNICAL DESCRIPTION: Practical glasses are multicomponent and usually contain more than one glass-forming oxide such as silica, alumina, and boron oxide. Fundamental understanding of the mixed glass-former effect on the structure and properties of glasses is important to glass processing as well as their technical applications. In this collaborative project, the team composed of researchers at the University of North Texas, Rensselaer Polytechnic Institute and Corning Inc. are combining atomistic simulations and experimental studies to gain insights of the mixed glass-former effect on industrially-important glass systems. The purpose of this project is to establish a general methodology for developing new interatomic potentials for oxide glasses with mixed network formers (SiO2, B2O3, and Al2O3). Specifically, they are developing new potentials based on a common functional form to capture the coordination variation and charge transfer for aluminosilicate, borosilicate, and boroaluminosilicate glasses. A general procedure is being formulated to fit potential parameters to the structure and properties of glasses obtained from their integrated experimental work on well-designed glass compositions of these systems. These newly developed potentials will be validated by experimental studies and used to perform systematic molecular dynamics (MD) simulations to understand the structural origins of glass properties including boron and aluminum anomalies. Simulations are also being used to predict optimal glass compositions and processing conditions for various technological applications. This project is providing training to graduate students and experiences as summer interns at leading industrial research laboratories for skill development in the experimental and computational aspects of glass research. New computational methods developed in this project are being incorporated into graduate and undergraduate level courses and research programs, as well as into the introduction of computational glass science to high school students.

非技术描述：准确了解玻璃的微观结构对于实现玻璃科学和技术的未来突破至关重要;这一进展受到玻璃固有结构复杂性的阻碍，特别是在工业上感兴趣的实际多组分玻璃系统中。随着玻璃研究进入新的十年，应对技术挑战需要对玻璃的结构-性能关系以及轻微组成变化对所得宏观性能的影响有前所未有的了解。在这个项目中，一个综合的实验和理论方法建立了一个全面的，统一的观点，玻璃的微观物理及其关系的宏观性能的技术重要性。这种整合始于原子间势模型的开发，实验提供了在参数拟合过程中使用的结构和属性数据。建立可靠的和验证的潜力，使玻璃组合物的设计与现实的加工条件，为新的应用技术的重要性。这种综合方法正在极大地改变玻璃研究的路线，并开始了一种基于计算设计新玻璃成分的新范式，而不仅仅是传统的经验方法。技术描述：实际玻璃是多组分的，通常含有一种以上的玻璃形成氧化物，如二氧化硅，氧化铝和氧化硼。了解混合玻璃形成剂对玻璃结构和性能的影响，对玻璃加工和技术应用具有重要意义。在这个合作项目中，由北德克萨斯大学、伦斯勒理工学院和康宁公司的研究人员组成的团队。正在结合原子模拟和实验研究，以深入了解混合玻璃形成剂对工业上重要的玻璃系统的影响。本项目的目的是建立一个通用的方法，为开发新的原子间相互作用势的氧化物玻璃与混合网络形成者（SiO2，B2 O3，和Al 2 O3）。具体而言，他们正在开发基于常见功能形式的新潜力，以捕获铝硅酸盐，硼硅酸盐和硼铝硅酸盐玻璃的配位变化和电荷转移。一个通用的程序正在制定，以适应潜在的参数的结构和性能的玻璃，从他们的综合实验工作，精心设计的玻璃组合物，这些系统。这些新开发的潜力将通过实验研究进行验证，并用于进行系统的分子动力学（MD）模拟，以了解包括硼和铝异常在内的玻璃特性的结构起源。模拟还用于预测各种技术应用的最佳玻璃成分和加工条件。该项目为研究生提供培训，并在领先的工业研究实验室担任暑期实习生，以培养玻璃研究实验和计算方面的技能。在这个项目中开发的新的计算方法正在被纳入研究生和本科水平的课程和研究计划，以及引入计算玻璃科学的高中学生。