The effect of Ti contents on energy storage properties of PLZST antiferroelectric ceramics

The effect of Ti contents on the microstructure, dielectric, and energy storage properties of prepared (Pb_0.97La_0.02) (Zr_0.53Sn_0.47)_1-xTi_xO₃ (PLZST) antiferroelectric ceramics by a traditional solid-state sintering method was systematically studied. The results showed that even though there are trace amounts of impurities in the prepared PLZST ceramics, the main crystal phases of the ceramics all have a perovskite structure. With the increase of Ti contents, the dielectric constant of PLZST ceramics gradually increases, and there is a significant improvement in the frequency stability of the dielectric performance for the ceramics. The antiferroelectric-ferroelectric phase transition field of PLZST ceramics gradually decreases with the increase of Ti contents, thereby enabling PLZST ceramic compositions with lower Ti content to exhibit higher energy storage density and energy storage efficiency at lower electric field intensities. When x = 0.10, PLZST ceramics exhibit optimal energy storage performance, with the recoverable energy storage density and the energy storage efficiency of 2.63 J/cm³ and 91.2%, respectively. Furthermore, the charge–discharge performance testing showed that PLZST ceramics with the components of x = 0.10 have fast discharge speed, high discharge current density, and power density.