Piezoelectric properties of ferroelectric materials poled by bias electric field are used in numerous modern piezoelectric applications including fuel injection valves, medical imaging probes or micro-electromechanical devices. Search for lead-free, single-crystal or high-temperature analogues of PZT ceramic materials urgently requires understanding in detail the mechanisms behind the piezoelectric phenomena in various perovskite ferroelectric systems. The process of poling and depoling is one of the most important issues, still being only poorly understood. The main target of this Ph.D. project is to design experimental set-up for studying some of these modern perovskite materials by polarized micro-Raman scattering as a function of the temperature under and electric field applied in situ, and to conduct experimental research of the phenomena associated with modification of macroscopic material properties by the poling procedure.
Seznam odborné literatury
1. M.E. Lines a A.M. Glass, Principles and applications of ferroelectrics and related materials, Oxford: Clarendon 1977
2. P. Bruesch, Phonons: Theory and experiments II, Springer 1987
Předběžná náplň práce v anglickém jazyce
Piezoelectric properties of ferroelectric materials poled by bias electric field are used in numerous modern piezoelectric applications including fuel injection valves, medical imaging probes or micro-electromechanical devices. Search for lead-free, single-crystal or high-temperature analogues of PZT ceramic materials urgently requires understanding in detail the mechanisms behind the piezoelectric phenomena in various perovskite ferroelectric systems. The process of poling and depoling is one of the most important issues, still being only poorly understood. The main target of this Ph.D. project is to design experimental set-up for studying some of these modern perovskite materials by polarized micro-Raman scattering as a function of the temperature under and electric field applied in situ, and to conduct experimental research of the phenomena associated with modification of macroscopic material properties by the poling procedure.
- zadáno a potvrzeno stud. odd.