Effects of Compositional Variations on Antiferroelectric-Ferroelectric Phase Transition of PZST Ceramics

Abstract

Abstract: Phase structures，properties and critical parameters of field-induced phase transitions of PZST ceramics
near ferroelectric(FE)-antiferroelectric(AFE) phase boundary were studied as a function of composition and temperature．The electric field-induced FE
state can maintain metastable state below the critical temperature T_FE-AFE after electric field is removed．As temperature increases，
the metastable FE state changes to AFE state at T_FE-AFE．As Ti content increases，the structure of unpoled PZST ceramics changes from
tetragonal AFE phase to rhombohedral FE phase，dielectric constant maximum ε_max and transition temperature T_FE-AFE increase，
switching field E_AFE-FE and E_FE-AFE decrease．The forward switching field E_AFE-FE and hysteresis Δ E were observed to
be dependent on T_FE-AFE and T_c，respectively，and E_AFE-FE and Δ E decreased with an associated increasing in T_FE-AFE and decreasing in T_c．

Key words: antiferroelectrics, electric field-induced phase transition, metastable state, ceramics

CLC Number:

TB323

YANG Tong-Qing,YAO Xi,ZHANG Liang-Ying. Effects of Compositional Variations on Antiferroelectric-Ferroelectric Phase Transition of PZST Ceramics[J]. Journal of Inorganic Materials.

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Effects of Compositional Variations on Antiferroelectric-Ferroelectric Phase Transition of PZST Ceramics

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