Pb0.94La0.04[(Zr0.70Sn0.30)0.90Ti0.10]O3 antiferroelectric bulk ceramics for pulsed capacitors with high energy and power density

Pb0.94La0.04[(Zr0.70Sn0.30)0.90Ti0.10]O3 antiferroelectric (AFE) bulk ceramics with both excellent energy storage and release properties were fabricated via the solid-state reaction method. The ceramics exhibited a high releasable energy density of 1.39 J/cm3, high efficiency of 92%, and good temperature stability under 104 kV/cm. Fast discharge current was measured, and a large current density up to 820 A/cm2 was achieved. The nonlinear dielectric behavior resulted in the variation of the discharge period of AFE ceramics. The stored charge was released completely due to the low remanent polarization, and the actually released energy density was about 1.0 J/cm3 in 400 ns. A high peak power density of 6.4 × 109 W/kg without a load resistor and an average power density of 3.16 × 108 W/kg with a 204.7 Ω load resistor were achieved in the rapid discharge process. The excellent energy storage and release properties indicate that the obtained antiferroelectric bulk ceramics are very promising for submicrosecond pulsed capacitors.