STRUCTURAL, FERROELECTRIC AND PIEZOELECTRIC PROPERTIES OF PbTiO3-MODIFIED COMPLEX 0.6Ba(Ti0.8Zr0.2)O3-0.4(Ba0.7Ca0.3)TiO3 CERAMICS

Tóm tắt

In this paper, the structural and ferroelectric properties of PbTiO₃-modified 0.6Ba(Ti_0.8Zr_0.2)O₃-0.4(Ba_0.7Ca_0.3)TiO₃ ceramics are reported. The nonlinear electric polarization is observed at room temperature in 0.6Ba(Ti_0.8Zr_0.2)O₃-0.4(Ba_0.7Ca_0.3)TiO₃ and remained after the introduction of PbTiO₃. With increasing the PbTiO₃ concentration to 7 mol.%, high electrical remanent polarization of 13.11 µC/cm² is achieved. The large strain and S_max/E_max values were also obtained in PbTiO₃-modified compounds, where the highest piezoelectric coefficient values were estimated at around 642 pm/V for 3 mol.% PbTiO₃-addition into 0.6Ba(Ti_0.8Zr_0.2)O₃-0.4(Ba_0.7Ca_0.3)TiO₃ compounds. We expected that the ceramics prepared in our study might be a suitable candidate for applications in electronic devices.