MPB機構とイオンオフセンター機構を同時に用いた医療用高性能圧電材料の創成

本研究项目的目的是从材料的离子偏心软化和相变相界(MPB)软化机理出发，通过结构工程来提高材料的压电性能。这项研究是由和田聪教授和金相宇博士在各自的专业领域合作进行的。今年的研究是通过结构工程来提高PZT陶瓷的Kp，并确定其晶体结构以实现研究目标。用同步辐射X射线衍射法证实了BaLa共掺PZT陶瓷中MPB的存在。此外，还证实了结构工程(MPB+离子偏心)能显著提高结构工程陶瓷的Kp值，从而有效地改善其电学性能。

The purpose of research project is to enhance piezoelectric property by the structural engineering on the basis of mechanism of material softening with ion off-centering and morpotropic phase boundary (MPB).This research project was conducted by Prof. Satoshi Wada and Dr. Sangwook Kim in cooperation with each other in their specialized fields. This year, the research was conducted to enhance of the kp in PZT ceramics through structural engineering, and confirming its crystal structure to achieve the research objectives. The existence of MPB in the Ba and La co-doped PZT ceramics was confirmed by synchrotron radiation X-ray diffraction, which was measured in the SPring-8. Besides, it was confirmed that structure engineering (MPB + ion’s off-centering) is effective in improving the electrical properties by showing a significantly higher kp value of structure engineered ceramics.