Huang Xuan, Yang Fengjuan, Du Lifei, Wang Jiong, Liang Yongfeng, Wu Pingping
The Higher Educational Key Laboratory for Flexible Manufacturing Equipment Integration of Fujian Province, Xiamen Institute of Technology, Xiamen 361021, China.
Department of Materials Science and Engineering, Xiamen Institute of Technology, Xiamen 361021, China.
Materials (Basel). 2025 Jul 31;18(15):3606. doi: 10.3390/ma18153606.
The design and adjustable properties of nanoporous materials are important for current and future technological applications, research, and development. In addition, nanoporous ferroelectric materials have the potential to achieve competitive ferroelectric, dielectric, and piezoelectric characteristics. In this work, using the phase-field model, we found that the shape of pores in barium titanite ceramics governs the formation of the ferroelectric domain structure and the switching hysteresis loop. A remanent polarization-coercive field (-) diagram is introduced to denote the shape of the hysteresis loops. We performed a fundamental study in understanding how the domain structures affect the properties of domain-engineered porous ferroelectrics. Simulation results show that the hysteresis loop of porous ferroelectrics can be designed by controlling the shape/orientation of the ellipse-shaped pores. Numerical simulations also verify that the dielectric/piezoelectric properties can be improved with artificially designed porous structures. These phase-field results may be useful in the development of highly performing lead-free ferroelectric/piezoelectric materials.
纳米多孔材料的设计及其可调节特性对于当前和未来的技术应用、研究与开发而言至关重要。此外，纳米多孔铁电材料有潜力实现具有竞争力的铁电、介电和压电特性。在这项工作中，我们使用相场模型发现，钛酸钡陶瓷中的孔隙形状决定了铁电畴结构的形成以及开关磁滞回线。引入了剩余极化 - 矫顽场（-）图来表示磁滞回线的形状。我们开展了一项基础研究，以了解畴结构如何影响畴工程化多孔铁电体的性能。模拟结果表明，多孔铁电体的磁滞回线可通过控制椭圆形孔隙的形状/取向来设计。数值模拟还证实，通过人工设计的多孔结构可改善介电/压电性能。这些相场结果可能有助于高性能无铅铁电/压电材料的开发。
