应哈工大材料学院材料科学系特种陶瓷研究所贾德昌教授和何培刚研究员的邀请，在哈工大先进陶瓷复合材料与涂层创新引智基地（111引智基地）的资助下，世界陶瓷学院院士、欧洲科学院院士、意大利帕多瓦大学Paolo Colombo教授，将于2023年11月2日至4日来我校交流，并作学术报告，欢迎各位老师和同学参加！
报告1时间：2023年11月3日上午9:00-10:30
报告1题目：Additive manufacturing of ceramics from liquid feedstocks
报告1地点：科学园C3栋特陶所417会议室
报告1摘要：
Additive manufacturing of ceramics is somewhat limited by their high melting temperatures and the processing issues related to handling of feedstocks containing a large volume of particles. Processing slurry-based feedstocks, in fact, poses several challenges: a high amount of powder is required to promote densification and results in high viscosity, scattering and sedimentation phenomena in vat photopolymerization processes, as well as clogging problems at the nozzle for extrusion-based processes.
Some of these issues can be solved or mitigated when using all liquid feedstocks. Our research activities have therefore focused on additive manufacturing of ceramics from liquid feedstocks. In particular, we investigated the use of preceramic polymers as well as sol-gel solutions. Despite the many advantages related to their liquid nature, there are also some challenges related to the reactivity of sol-gel systems and to the high amount of solvent usually present.
Here, our strategies for producing high quality ceramic components using a variety of liquid feedstocks and different additive manufacturing techniques, from direct ink writing, digital light processing and two photon polymerization to robotic arm manufacturing and volumetric additive manufacturing will be presented.
报告2时间：2023年11月3日下午14:00-15:30
报告2题目：Additive Manufacturing of Porous Geopolymers
报告2地点：科学园C3栋特陶所417会议室
报告2摘要：
Geopolymers possess a chemical composition similar to zeolites, intrinsic micro- and mesoporosity and have ion-exchange capabilities; these features make them highly interesting for environmental applications as sorbents and catalysts for multiple reactions. Moreover, the possibility of room to low temperature consolidation, low CO2 emissions and the fact that they can be obtained from waste make geopolymers attractive from the processing point of view.
Our group has been exploring Direct Ink Writing as an additive manufacturing route for hierarchically porous components comprising geopolymers as active material and/or as a matrix for active fillers such as zeolites and activated carbons. Lattices and other structures with designed macroporosity above 50%vol were fabricated and characterized in terms of microstructure, mechanical properties, specific surface area and permeability. Specific compositions and functionalization protocols were developed for selected applications, including biodiesel production catalysis, CO2 adsorption, water purification from cationic and anionic pollutants as well as pharmaceuticals.
Large scale binder jetting of geopolymer-based components has also been carried out, for fire protection applications in tunnels, adding either metakaolin or a reactive slag to the powder bed and generating parts by selective jetting of an alkaline solution. In addition, temperature-resistant molds for the production of blown art glass parts have been successfully manufactured.
Paolo Colombo教授简介
Paolo Colombo is a professor of Materials Science and Technology at the Department of Industrial Engineering, University of Padova, Padova, Italy. He graduated from the University of Padova with a degree in chemical engineering in 1985. He was an assistant professor at the University of Padova from 1990 to 1998 and then an associate professor at the University of Bologna, until 2005. He was elected Academician of the World Academy of Ceramics (2006), Academician of the European Academy of Sciences (2016), Fellow of the American Ceramic Society (2010), Fellow of the Institute of Materials, Minerals and Mining (2011) and Fellow of the European Ceramic Society (2017). He was Principal Investigator for PRIN, Vigoni, Galileo projects and has been involved in European Projects (FP6, FP7, Horizon 2020). He was Principal Investigator for several research contracts with national and international companies.
He is also an adjunct professor of Materials Science and Engineering at the Pennsylvania State University. He was a Foreign Scientist at INSA, Lyon, France in 2015, and a DGF Mercator Professor at the Technical University Bergakademie Freiberg, Germany in 2016. He was awarded the Pfeil Award (The Institute of Materials, Minerals and Mining, London, UK) in 2007, the Global Star Award (The Engineering Ceramics Division of the American Ceramic Society) in 2010, the Edward C. Henry Award (The Electronics Division of The American Ceramic Society) in 2011, the Verulam Medal & Prize (The Institute of Materials, Minerals and Mining, London, UK) in 2013 and the Global Ambassador Award (The American Ceramic Society) in 2016.
Paolo Colombo’s research interests include novel processing routes to porous glasses and ceramics (currently focusing mainly on Additive Manufacturing, using different technologies), the development of ceramic components from preceramic polymers and geopolymers, and the vitrification and reuse of hazardous industrial and natural waste. He published more than 230 papers in peer-reviewed journals, 9 book chapters and holds 12 international patents. He is co-editor of a book on cellular ceramics, a book on polymer-derived-ceramics and 11 proceedings books.