清華大學材料科學與工程研究院《材料科學論壇》

學術報告

報告題目：Lead-free Piezoceramics: Impending Transfer

報告人：Jürgen R?del（Institute  of Materials Science, Technische Universit?t Darmstadt）

報告時間：2018年7月17日（星期二）下午3:00

報告地點：清華大學逸夫技術科學樓B213報告廳

聯系人：李敬鋒老師  62784845

報告摘要：
In this talk recent scientific achievements for several lead-free options will be reviewed and new scientific understanding will be highlighted. Then select recent discoveries will be discussed, for example the use of NBT-based composites for high-power applications.
Then the chances for transfer into application will be discussed. In fact, this has already started with several international companies making progress in research and application of lead-free piezoceramics. The reasons are two-fold: Environmental drive and legislative efforts but also the opportunities in select applications to develop lead-free piezoceramics better than PZT.
For the latter aspect I will discuss areas, where lead-free piezoceramics offer advantages like the ability to co-sinter with nickel, a higher fracture toughness, a higher fracture strength, a better ability at high-power conditions, a higher thermal conductivity and others.
The talk will end with recommendations for future research both in basic science as well as in transfer into application.

報告人簡介：
Jürgen R?del received a diploma in Materials Science from University of Erlangen-Nürnberg in 1983 and a Ph.D. from UC Berkeley in 1988 as well as a habilitation in Materials Engineering from Technische Universit?t Hamburg-Harburg (TUHH) in 1992. He held postdoc positions at National Institute of Standards and Technology and at TUHH. Since 1994 he works as professor at TU Darmstadt. He is also an honorary professor at USTB and currently a distinguished visiting professor at Tsinghua University (both Beijing) as well as specially appointed professor at Tokyo Institute of Technology, Japan. R?del is the author or coauthor of 300 refereed publications. Over the years his research covered sintering, mechanical properties, electrical reliability, lead-free piezoceramics and dislocation-tuned functionality. In Germany he received the highest awards by the Deutsche Forschungsgemeinschaft for young (Heintz-Maier-Leibnitz prize) and for senior (Leibniz-Prize) scientists and is member of the National Academy of Science and Technology. He also received the IEEE ferroelectrics recognition award.