时 间： 2016 年 12 月 27 日 10 : 00 - 12 : 00
地 点：西一楼一楼会议室
报告人：Satoshi Wada 教授，日本山梨大学
邀请人：张光祖 副教授
报告摘要：
弛豫铁电体诸如PZN-PT和PMN-PT，畴结构取决于化学组成和晶体取向，弛豫无铅铁电体可能具有高压电性能。BT-Bi(Zn1/2Ti1/2)O3（BT-BZT）、BT-Bi（Mg1/2Ti1/2）O3（BT-BMT）等弛豫铁电体具有高Tmax超过250?C，高介电常数。因此，可以通过上述弛豫体与正常铁电体（830℃的高Tc的BiFeO3（BF））之间的固溶体系来控制畴结构。
It is well known that for the relaxor-based ferroelectrics such as PZN-PT and PMN-PT, the domain configuration is dependent on chemical composition and crystallographic orientation. This means that if relaxor-based lead-free ferroelectrics are prepared, it is expected that they might have high piezoelectric performances. Recently, we reported that BT-Bi(Zn1/2Ti1/2)O3 (BT-BZT) and BT-Bi(Mg1/2Ti1/2)O3 (BT-BMT) were relaxorferroelectrics with high Tmax(temperature with maximum dielectric constant) over 250 ?C. Thus, it is possible to control domain configurations by solid solution system between the above relaxorsand normal ferroelectric such as BiFeO3 (BF) with high Tcof 830 ?C.
报告人介绍：
Dr. Wada是日本山梨大学材料科学与技术专业教授。他的主要研究方向包括介电、压电纳米颗粒，陶瓷，单晶，纳米结构诱导增强性能以及铁电材料的畴设计等.他在材料科学领域撰写了超过250篇出版物，20项专利，7本合著书籍。他是美国陶瓷学会，材料研究学会，日本陶瓷学会，日本应用物理学会，日本物理学会，日本化学会，日本催化学会和粉末学会委员。他于1996年获得MRS日本最佳陈述奖，1997年日本陶瓷学会JCerSJ最佳手稿奖，1999年电气陶瓷部年轻科学家奖，2005年PFEIL奖，2007年美国Richard Fulrath奖，2007年日本应用物理学会JJAP编辑贡献奖，2008年日本AEM协会AEM奖，2009年日本陶瓷学会CSJ奖。
Dr. Wada is a professor of Material Science and Technology at University of Yamanashi. His main research interests include dielectric and piezoelectric nanoparticles, ceramics and single crystals, nano-structure induced enhanced property, and domain engineering in ferroelectric materials. He has authored more than 250 publications, 20 patents, and 7 co-authored books in the material science field. He received the Best Presentation Award of MRS-Japan in 1996, the JCerSJBest Manuscript Award of the Ceramics Society of Japan in 1997, the Young Scientist Award of ElectroceramicsDivision in 1999, the PFEIL Award in 2005, the Richard FulrathAward of the American Ceramics Society in 2007, the JJAP Editorial Contribution Award of the Japanese Applied Physics Society in 2007, the AEM Award of the Japan AEM Society in 2008 and the CSJ Award of the Ceramics Society of Japan in 2009.
