Abstract
Sr-containing PZT compositions were selected for identifying the ferroelectric (FE)-antiferro-electric (AFE) phase boundary within the zirconium rich region of the PbZrO3-PbTiO3-SrTiO3-SrZrO3 phase diagram and for inducing the AFE-FE phase transition upon application of an applied electric field. Processing methods, based on the powder processing and sintering, were developed for fabricating dense (98.5% of theoretical density) Sr-containing PZT samples suitable for the polarization measurements. PZT specimens, with a uniform microstructure and an average grain size of 3 μm were obtained. Polarization measurements were used to locate the FE-AFE phase boundary. Subsequently, compositions near the FE-AFE phase boundary were studied for the electric field induced AFE-FE phase transition. Field-induced AFE-FE phase switching was observed in compositions close to the AFE-FE boundary. Residual polarization upon AFE-FE transformation suggested a coexistence of both ferroelectric and antiferroelectric phases.
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