报告题目：High refractive index glasses prepared by containerless processing
报告人：Atsunobu Masuno博士
报告时间：2012年09月14日14：00
报告地点：云顶yd222线路检测西溪校区西七楼343
联系人：周时凤
Abstract:
Glasses have been abundant on the earth from ancient times. Mankind has developed modern civilization using various types of glasses such as window glass, lens, fiber, transparent conductor, and so on. One of the few limitations of glasses is composition limitation; Glasses must comprise a large amount of materials called as network formers such as SiO2, B2O3, and P2O5. The glass forming rule has been believed for centuries and narrowed glass science to a specific composition region. In my presentation, I will talk about new glass formation out of the classical glass forming rule and glass structure analysis. The glasses are classified into TiO2-, Nb2O5-, Ta2O5-, Al2O3-, and WO3-based compositions. They have quite high refractive index ~ 2.3 and low wavelength dispersion in the visible region and were found to be promising materials for innovative optical applications. Furthermore, we found the glasses were highly ionic and had densely oxygen packing state, which are different nature from conventional glass systems. We obtained new picture of glass formation by applying structural analyses techniques at an atomic level by using Synchrotron XRD, neutron diffraction, and reverse Monte-Carlo simulation.
报告人简介：
Atsunobu Masuno is Assistant Professor in Institute of Industrial Science, The University of Tokyo from 2007. His main interest is the structural origin of the functionality of amorphous and crystalline materials. The functionality that he focuses on is wide-ranging, such as optical, electric, magnetic, and mechanical properties. After graduating from Kyoto University, he was a post-doc in Kyoto University and then he joined Japan Aerospace Exploration Agency as a researcher in 2006.
