Institute of Physics of Materials AS CR, v. v. i. > Projects > Tailoring of interfaces in lead-free ferroelectric-dielecric composites to enhance their electromechanical properties

Tailoring of interfaces in lead-free ferroelectric-dielecric composites to enhance their electromechanical properties

Co-investigatorIng. Zdeněk Chlup, Ph.D.
Number of Project21-24805S
AgencyGrantová agentura České republiky
Duration2021-01-01 - 2023-12-31

Anotace
Composites utilizing a combination of mechanical and electrical properties of components are favourable for improving properties of materials in electronics. Some properties of the composite can be enhanced beyond the values of its components. Composites combining ferroelectric and dielectric grains seem to be promising. The grains of lead-free strongly piezoelectric ceramics BTO, BCZT and BCSnT will be combined with high-modulus grains of Al2O3 and ZrO2 to increase the mechanical resistance and electromechanical bonding. Our experience with the preparation of functional ceramics shows that controlled processing has a positive effect on their properties. We thus propose systematic research of chemical syntheses with an application of advanced shaping and sintering methods to tailor the chemical and phase composition, microstructure and properties of the interfaces. Electromechanical properties will be determined experimentally and modelled concerning to the microstructure. The influence of the phase transformation of the ferroelectric component on the properties will be also studied.