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[青促会物理论坛(37)] 无铅压电陶瓷的相界调控及性能提高机理
时间: 2018年12月12日 10:30
地点: 中国科学院皇冠赌场 M238会议室
报告人: Ke Wang, Ph.D. (王轲)

School of Materials Science and Engineering,
Tsinghua University

Piezoelectric ceramics based on potassium-sodium-niobate was brought into focus with a publication in 2004. After years of dedication, these materials are considered as the most promising lead-free piezoceramics with comprehensive performance, but the structure-property relationships are still only vaguely described. Besides, thermal stability issue is merely partly resolved, which leaves further room for phase boundary engineering. Technological advancement has recently focused on using base metals as inner electrode for multilayer actuators, which provides cost benefits as compared to PZT devices. Successful removal of expensive tantalum as well as controversial antimony certainly pushes forward these materials towards a broad range of applications. Remaining frequently observed challenges, such as poor sintering ability and weak reproducibility of functional properties, still hinder extensive application of these materials, but have little chance to become fatal obstacles. 

报告人简介

Dr. Ke Wang (优青/青长) is an associate professor at School of Materials Science and Engineering, Tsinghua University in Beijing, China. He received his Ph. D from Tsinghua University in 2010. Afterward, he joined Prof. Jürgen Rödel’s group (NAW) in Darmstadt, Germany, as a Humboldt Postdoctoral Research Fellow. In the year 2012, he became a faculty member in Tsinghua University, continuing his scientific interests in various piezoelectric materials and devices. Dr. Wang has authored/coauthored more than 80 journal publications.

联系人:葛琛 (82649478, gechen@iphy.ac.cn)

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