纳米多孔钛酸钡的增强铁电性:相场预测

IF 1.2 4区材料科学 Q4 MATERIALS SCIENCE, MULTIDISCIPLINARY

Philosophical Magazine Letters Pub Date : 2021-06-03 DOI:10.1080/09500839.2021.1933641

Cheng Xie, He Zhao, L. Du, H. Du, Pingping Wu

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引用次数: 5

摘要

多孔铁电材料在实现具有竞争力的介电/压电性能和轻质性能方面显示出巨大的潜力。本研究采用相场模型模拟多孔钛酸钡的铁电畴结构演变过程。结果表明，多孔陶瓷的铁电/介电/压电性能受孔隙率和孔隙尺寸的影响较大。通过引入对称破缺机制，证明了椭圆孔纳米多孔铁电体的铁电开关性能、残余极化、介电常数和压电常数得到了提高。通过提供一种实现增强性能的方法，具有椭圆形孔的纳米多孔铁电体可能对铁电体的应用产生广泛的影响，并在选定的应用中提高材料的实用性。

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Enhanced ferroelectricity for nanoporous barium titanate: a phase-field prediction

ABSTRACT Porous ferroelectric materials show great potential for achieving competitive dielectric/piezoelectric properties with light weight. In this study, a phase-field model was employed to simulate the ferroelectric domain structure evolution of porous barium titanate. It is suggested that the ferroelectric/dielectric/piezoelectric properties are strongly influenced by the porosity level and the size of pores for porous ceramics. It is demonstrated that the ferroelectric switching behaviour, the remnant polarisation, the dielectric constant and the piezoelectric constant are enhanced in nanoporous ferroelectrics with ellipse-shaped pores by introducing mechanisms of symmetry breaking. By providing a means of achieving enhanced properties, nanoporous ferroelectrics with ellipse-shaped pores may have a broad impact on the applications of ferroelectrics and enhance the utility of the materials for selected applications.

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来源期刊

Philosophical Magazine Letters 物理-物理：凝聚态物理

CiteScore

2.60

自引率

0.00%

发文量

审稿时长

2.7 months

期刊介绍： Philosophical Magazine Letters is the rapid communications part of the highly respected Philosophical Magazine, which was first published in 1798. Its Editors consider for publication short and timely contributions in the field of condensed matter describing original results, theories and concepts relating to the structure and properties of crystalline materials, ceramics, polymers, glasses, amorphous films, composites and soft matter. Articles emphasizing experimental, theoretical and modelling studies on solids, especially those that interpret behaviour on a microscopic, atomic or electronic scale, are particularly appropriate. Manuscripts are considered on the strict condition that they have been submitted only to Philosophical Magazine Letters , that they have not been published already, and that they are not under consideration for publication elsewhere.