A comparative study of the polarization degradation mechanisms during electric cycling in (Bi1/2Na1/2)TiO3-based relaxors
Date
2020-03-15
Authors
Fan, Zhongming
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Elsevier Ltd.
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Materials Science and Engineering
Materials engineers create new materials and improve existing materials. Everything is limited by the materials that are used to produce it. Materials engineers understand the relationship between the properties of a material and its internal structure — from the macro level down to the atomic level. The better the materials, the better the end result — it’s as simple as that.
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Abstract
The polarization degradation during electric field cycling in a ferroelectric ceramic is closely related to the phase composition. In the present work, electric biasing in-situ transmission electron microscopy (TEM) fatigue tests are conducted on relaxors of (1–x)(Bi1/2Na1/2)TiO3–xSrTiO3. It is directly observed that the ceramic of x = 0.25 features an irreversible relaxor-ferroelectric phase transition and the domain walls in the metastable ferroelectric phase sweep shorter and shorter distances during cycling. In contrast, the ceramic of x = 0.27 features a reversible relaxor-ferroelectric transition and the domain walls in the transient ferroelectric phase remain highly mobile even after 104 cycles.
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This is a manuscript of an article published as Fan, Zhongming, and Xiaoli Tan. "A comparative study of the polarization degradation mechanisms during electric cycling in (Bi1/2Na1/2) TiO3-based relaxors." Scripta Materialia 178 (2020): 334-338. DOI: 10.1016/j.scriptamat.2019.11.061. CC BY-NC-ND. Copyright 2019 Acta Materialia Inc. Posted with permission.