2026/07/01 by Sreenu Gomasu, Didier Fasquelle
Materials Science · #Ferroelectric and Piezoelectric Materials #Electronic and Structural Properties of Oxides #Dielectric properties of ceramics
paper · pdf · doi:10.1016/j.tsf.2026.141007
(Ba, Ca)(Zr, Ti)O 3 (BCZT) is a widely recognized perovskite piezoelectric oxide used in energy harvesting applications. In our current research, 0.5Ba(Zr x Ti (1- x ) )O 3 + 0.5(Ba y Ca (1- y ) ) TiO 3 (0.5BZT-0.5BCT) ferroelectric thin films were deposited by spin-coating onto Pt/Ti/SiO 2 /Si commercial substrates. The solutions were synthesized using the sol-gel processing method. Various precursors were selected for different compositions, and their impacts were carefully analysed. Multiple spin-coating cycles were employed, followed by drying and pyrolysis. The effect of composition for Ba:Ca and Zr:Ti on structural, microstructural, topographical, dielectric, and ferroelectric properties was examined. The evolution of dielectric permittivity and dielectric loss was recorded as a function of frequency (f) from 20 Hz to 1 MHz. The optimized 0.5BZT-0.5BCT exhibited stable dielectric values over a wide frequency range, with a high dielectric permittivity of ∼1020 and a low dielectric loss of ∼0.02 at 100 kHz. The obtained results were discussed in comparison with earlier reports. Polarization (P) as a function of electric field (E) hysteresis curves demonstrated the ferroelectric nature of the thin films, with no excess leakage current. The high and stable dielectric permittivity and low dielectric losses over a large frequency range presented in our work suggest that 0.5Ba(Zr 0.1 Ti 0.9 )O 3 + 0.5(Ba 0.85 Ca 0.15 )TiO 3 oxide is a suitable candidate for the development of energy harvesting devices.