Abstract
In present work, a novel ceramic composition of (1-x)NaNbO3-xBi1/3ZrO3 was designed to break through the bottleneck that high energy density (Wd) and power density (PD) are difficult to coexist for pulse discharge applications. The modified ceramics exhibited well-defined double P-E loops, a high PD of ∼22.5 MW/cm3 and a high Wd of ∼0.22 J/cm3 simultaneously, superior to other published works. The structural analysis showed that the unstable antiferroelectric P phase gradually transforms into the stable R phase after Bi1/3ZrO3 modification, mainly due to the great decrease of P-R transition temperature to 175 oC. In addition, P-E and I-E results under large signals further demonstrated the phase transition from P to R phase. Our work provides a significant way to regulate the phase transition of sodium niobate.
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