报告人：Dae-Yong Jeong

单位：Department of Materials Science and Engineering, Inha University, Incheon, Republic of Korea

报告时间：2026年4月3日（星期五）上午10:00

报告地点：知新楼C座702量子报告厅

邀请人：王春明

个人简介：

Professor Dae-Yong Jeong currently serves as the Dean of the Graduate School of Engineering and a Professor in the Department of Materials Science and Engineering at Inha University in Korea.

He began his academic journey at Seoul National University, where he earned both his BS and MS degrees, followed by a period of industrial experience within Korea. He later transitioned to the United States for his doctoral studies, receiving his Ph.D. from Pennsylvania State University in 2004 with a focus on relaxor ferroelectric properties and their practical device applications.

His professional career is marked by significant international experience, including research roles at TRS Technologies in the USA and the Research Institute of Electrical Communication (RIEC) at Tohoku University in Japan. Upon returning to Korea, he contributed his expertise as a senior researcher at the Korea Institute of Science and Technology (KIST) and as an assistant professor at Myongji University. Since joining the faculty at Inha University in September 2011, Professor Jeong has dedicated his research to energy harvesting, ferroelectrics, nano-engineering for materials development, high-energy density capacitors, and piezoelectric devices. Beyond his technical research, he is deeply committed to advancing innovative engineering education and the strategic development of intellectual properties.

报告摘要：

Ferroelectrics have the possibility of various application thanks to their large dielectric and piezoelectric characteristics at the morphotropic phase boundary (MPB) that have been conventionally formed through the chemical reaction at a high sintering temperature. Nano-clustering by aerosol deposition (AD) could implement the dense microstructure with the coexistence of distinct phases in the nano-scale forming artificial MPB at the room temperature. Herein, the nano-clustered (NC) antiferroelectric PbZrO₃ (PZ)- ferroelectric PbTiO₃ (PT) films presented improved ferroelectric properties at artificial MPB. The origin of the artificial MPB in NC PZ-PT film was verified through the phase field modeling (PFM). Simultaneously, NC PZ-PT films presented better electric fields and thermal stabilities than those of solid solution (SS) Pb(Zr,Ti)O₃ (PZT) films. Finally, physically tailored nano-clustering of two distinct phases in the composite films by AD overcomes the limitations of the traditional chemical solid solution route to fabricate the high-performance ferroelectrics at MPB.