Exploiting porosity in ferroelectric materials by local field engineering

towards improved functional properties

Financed by the Romanian National Authority for Scientific Research, CNCS – UEFISCDI,
project   PN-II-RU-TE-2014,   no. 257 / 2015

Director of proiect:
 dr. Leontin PADURARIU
(Faculty of Physics, Alexandru Ioan Cuza University, Ia┼či)

              Ferroelectric-based composites are considered a better alternative to single phase ferroelectrics to accomplish the technological requirements for many applications in microelectronics. The electrical properties of such systems are governed by the inhomogeneity of the local electric field introduced by the interfaces between phases with different local permittivity. Among ferroelectric-based composites, in porous ferroelectric ceramics the local field inhomogeneity effect is maximized due to the huge permittivity contrast (1 for pores and thousands for bulk). Although porosity was generally considered undesired in ferroelectrics because is usually detrimental from functional properties point of view, when is not controlled, recent reports showed enhancement of some properties, which make very appealing a study aimed to a deeper understanding of porosity in electroceramics properties. Therefore, by local field engineering through microstructural control, porous ferroelectric present a great potential to accomplish the desired electrical properties in microelectronics. In the present project, by a multidisciplinary approach of modeling, preparation and electrical characterization, we propose to demonstrate the usefulness of local field engineering approach combined with advanced preparation methods for controlling the microstructures, in order to exploit porosity as a new tool for improving some specific functional properties of ferroelectrics


MODx - Mollio