Enhanced energy storage properties and stability in (Pb0.895La0.07)(ZrxTi1-x)O3 antiferroelectric ceramics

Recently, the (Pb,La)(Zr,Ti)O-3 antiferroelectric materials with slim-and-slanted double hysteresis loops have been widely drawn in the application of advanced pulsed power capacitors due to its low strain characteristic. In this work, the energy storage properties of (Pb0.895La0.07)(ZrxTi1-x)O-3 ceramics with different Zr contents are researched thoroughly because the substitution of Ti4+ by Zr4+ can reduce the tolerance factor t, enhancing the antiferroelectricity. The polarization-electric field hysteresis loops of the PLZT ceramics become slimmer with increasing Zr content. The highest recoverable energy storage density (W-re) of 3.38 J/cm(3) and ultrahigh energy efficiency (eta) of 86.5% are achieved in (Pb0.895La0.07)(Zr0.9Ti0.1)O-3 ceramic. The (Pb0.0895La0.07)(Zr0.9Ti0.1)O-3 ceramic also hold fairly thermal stability (relative variation of W-re is less than 28% over 30 degrees C-120 degrees C), excellent frequency stability (10-1000 Hz) and good fatigue endurance. These results demonstrate that the (Pb0.895La0.07) (Zr0.9Ti0.1)O-3 ceramic can be a desirable material for dielectric energy storage capacitors, especially for pulse power technology.