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The high‐energy storage density reported in lead‐free AgNbO 3 ceramics makes it a fascinating material for energy storage applications. The phase transition process of AgNbO 3 ceramics plays an important role in its properties and dominates the temperature and electric field dependent behavior. In this work, the phase transition behavior of AgNbO 3 ceramics was investigated by polarization hysteresis and dielectric tunability measurements. It is revealed that the ferrielectric ( FIE ) phase at room temperature possesses both ferroelectric ( FE )‐like and antiferroelectric ( AFE )‐like dielectric responses prior to the critical AFE ‐ FE transition point. A recoverable energy storage density of 2 J/cm 3 was achieved at 150 kV/cm due to the AFE ‐ FE transition. Based on a modified Laudau phenomenological theory, the stabilities among the AFE, FE and FIE phases are discussed, laying a foundation for further optimization of the dielectric properties of AgNbO 3 .
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Gao et al. (2018) studied this question.
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