Abstract
Abstract(1‐x)Sr0.7Pb0.15Bi0.1TiO3‐xBi4Ti3O12 ((1‐x)SPBT‐xBIT, x = 0‐0.125) bulk ceramics were developed and calcined via the solid‐state method, aimed at the application of pulsed power capacitors. The phase structures, temperature stability, hysteresis loop, and discharge properties were systematically investigated. Considering both the temperature stability and dielectric properties, 0.925SPBT‐0.075BIT bulk ceramics with a capacitance variation satisfying the X7R specification were developed for pulsed power capacitors. The energy storage density was 0.252 J/cm3, and the ceramics showed high temperature stability at 80 kV/cm. The discharge current waveforms of the 0.925SPBT‐0.075BIT ceramics were recorded. A high discharge power density of approximately 1.01 × 108 W/kg with an 8 Ω load resistor and short discharge period of 84 ns were achieved at 50 kV/cm. The good temperature stability properties and high power density show that the 0.925SPBT‐0.075BIT ceramics are well suited for pulsed power capacitors with a wide temperature range.
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