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Zhang, Mao Hua
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Publications (6/6 displayed)
- 2024Heterogeneous Antiferroelectric Ordering in NaNbO3-SrSnO3 Ceramics Revealed by Direct Superstructure Imaging
- 2024Coupled local residual shear and compressive strain in NaNbO3 ceramics under coolingcitations
- 2022Revealing the solid-state processing mechanisms of antiferroelectric AgNbO3 for energy storagecitations
- 2021Domain morphology of newly designed lead-free antiferroelectric NaNbO3-SrSnO3 ceramicscitations
- 2021Polarization Rotation at Morphotropic Phase Boundary in New Lead-Free Na1/2Bi1/2V1-xTi xO3 Piezoceramicscitations
- 2020Electric-field-induced antiferroelectric to ferroelectric phase transition in polycrystalline NaNbO3citations
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article
Heterogeneous Antiferroelectric Ordering in NaNbO3-SrSnO3 Ceramics Revealed by Direct Superstructure Imaging
Abstract
<p>NaNbO<sub>3</sub>-based antiferroelectric materials offer a promising pathway toward greener and more cost-effective energy storage devices. However, their intrinsic structural instabilities often lead to reduced energy density that compromises their performance and longevity. In this letter, we demonstrate how Dark-Field X-ray Microscopy─when carried out on the characteristically weak 1/4{843}<sub>pc</sub> superstructure reflection─can map the antiferroelectric phase and its strain heterogeneity in small, deeply embedded grains of a NaNbO<sub>3</sub> and 0.95NaNbO<sub>3</sub>-0.05SrSnO<sub>3</sub> ceramics, representative of different phase transition behavior. Our results illustrate the stabilizing effect of SrSnO<sub>3</sub> on the antiferroelectric phase via the enhancement of mesostructural order. In doing so, our method establishes a new platform for exploring the impact of disorder on the long-range strain heterogeneity within antiferroelectrics and other materials with modulated crystal structures.</p>