Non-linear dielectric, electric field-forced antiferroelectric-to-ferroelectric (AFE/FE) phase switching materials are attractive for DC bus and voltage clamp capacitors used in power electronic inverter applications. This is mainly due to the properties such as high dielectric constant at high bias fields, high volumetric efficiency, low ESR, high reliability, and high frequency and wide temperature range of operation. In the present paper, the detailed dielectric and polarization measurements, along with highly accelerated lifetime test (HALT) preliminary results for modified lead zirconate titanate (PZT) based capacitors are presented. The energy densities of AFE/FE dielectrics are much higher, typically in the range of ～8-15 J/cm~3 observed for modified PZT ceramics as compared to ～3 J/cm~3 for polystyrene, with the primary objective of reduction in the capacitor volume used in the power electronic inverter circuits.
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