CARPATH

Team

Project manager: lect.dr. Lavinia-Petronela Curecheriu
CS II dr. Cristina-Elena Ciomaga
Asist.dr. Leontin Padurariu
PhD Student- vacant position

Objectives

Stage I – 2018
Experimental and theoretical study of size dependent properties in lead free piezoelectric ceramics with GS from ~1µm up to tens of µm:

1.1 Structural & microstructural characterisation of single phase BCTZ ceramics: monitoring the effect of grain size and temperature on the structural modifications;
1.2 Raman investigation of the role of grain size, temperature and field (if available) on the local structure of single phase ceramics (to be continue in 2019);
1.3 Low-field broadband dielectric spectroscopy and sub-switching characteristics (Rayleigh) (to be continue in 2019);
1.4 Study of poling effect on the piezoelectric constants (to be continue in 2019)
1.5 Mesoscale modelling (Monte Carlo with FEM calculations) to describe size effects on the low-field properties in BCTZ ceramics (to be continue in 2019);
1.6 Dissemination, coordination, management

Stage II – 2019
Experimental and theoretical study of grain size and composition effect on the functional properties of single phase and composite lead free piezoelectric ceramics:

II. 1 Raman investigation of the role of grain size, temperature and field (if available) on the local structure of single phase ceramics (finish);
II.2 Low-field broadband dielectric spectroscopy and sub-switching characteristics (Rayleigh) (finish);
II.3 Study of poling effect on the piezoelectric constants (finish)
II.4 Investigation of size dependent piezoelectric properties in single phase BCTZ;
II.5 Investigation of size effects on high field properties from mesoscale (AFM/PFM) to macroscale (P(E), tunability)
II.6 Mesoscale modelling (Monte Carlo with FEM calculations) to describe size effects on the low-field properties in BCTZ ceramics (finish)
II.7 Modelling of dielectric/piezoelectric/ferroelectric vs. field responses in realistic BCTZ ceramics with different grain sizes.
II.8 Structural & microstructural characterisation of BCTZ composite ceramics;
II.9 ThermoRaman investigation of grain size dependent of phase transitions in composite ceramics
II.10 Macroscopic ferroelectric (P(E), sub-switching experiments) and dc-tunability study (to be continue 2020)
II.11 Multiscale models (FEM, Monte Carlo, Preisach) to describe the grain size effect in BCTZ composite piezoelectric ceramics (to be continue 2020)
II.12 Microstructural investigation of BCTZ composite ceramics; study of compositional dependent interconnectivity
II.13 Raman investigation of compositional effect on local structure;
II.14 Macroscopic ferroelectric (P(E), sub-switching experiments) and dc-tunability study (to be continue 2020)
II.15 Study of poling effect on piezoelectric coefficients in BCTZ composites (to be continue 2020)
II.16 Multiscale models (FEM, Monte Carlo, Preisach) to describe the composition-effect in BCTZ composite piezoelectric ceramics (to be continue 2020)
II.17 Dissemination, coordination, management

Stage III – 2020
Investigation of compositional and size effects on high field properties of BCTZ composite ceramics

III.1 Macroscopic ferroelectric (P(E), sub-switching experiments) and dc-tunability study (finish)
III.2 Investigation of size dependent piezoelectric properties in BCTZ composite ceramics
III.3 Multiscale models (FEM, Monte Carlo, Preisach) to describe the grain size effect in BCTZ composite piezoelectric ceramics (finish)
III.4 Macroscopic ferroelectric (P(E), sub-switching experiments) and dc-tunability study (finish)
III.5 Study of poling effect on piezoelectric coefficients in BCTZ composites (finish)
III.6 Multiscale models (FEM, Monte Carlo, Preisach) to describe the composition-effect in BCTZ composite piezoelectric ceramics (finish)
III.6 Dissemination, coordination, management