Morphotropic phase boundary (MPB) is a critical transition region in the composition phase diagram of a piezoelectric or ferroelectric material, where the crystal structure of the material changes abruptly and the electromechanical properties are maximal.[1][2][3] It is an important parameter in the design of nonlinear materials with highly nonlinear dielectric and piezoelectric properties.[4] In ferroelectric polymers, it is used to enable a large piezoelectric effect.[5] It is also found in thermoelectric materials.[6]
In piezoelectric polymers, the morphotropic phase boundary refers to the phase transition between tetragonal and rhombohedral ferroelectric phases following a change in composition or mechanical pressure. in some piezoelectric materials like polarized organic piezoelectric materials, it is either not found or rarely found. In these materials, MPB can be induced by using some mechanism, to achieve high performance of piezoelectric effects.[7][5]
References
edit- ^ Teh, Ying Shi; Li, Jiangyu; Bhattacharya, Kaushik (2020-11-02), Understanding the morphotropic phase boundary of perovskite solid solutions as a frustrated state, arXiv, doi:10.48550/arXiv.2011.00752, arXiv:2011.00752, retrieved 2026-03-21
- ^ Ahart, Muhtar; Somayazulu, Maddury; Cohen, R. E.; Ganesh, P.; Dera, Przemyslaw; Mao, Ho-kwang; Hemley, Russell J.; Ren, Yang; Liermann, Peter; Wu, Zhigang (2008). "Origin of morphotropic phase boundaries in ferroelectrics". Nature. 451 (7178): 545–548. doi:10.1038/nature06459. ISSN 1476-4687.
- ^ Cordero, Francesco (2015-12-02). "Elastic Properties and Enhanced Piezoelectric Response at Morphotropic Phase Boundaries". Materials. 8 (12): 8195–8245. doi:10.3390/ma8125452. ISSN 1996-1944. Archived from the original on 2025-05-15.
- ^ "Morphotropic Phase Boundary - an overview | ScienceDirect Topics". www.sciencedirect.com. Retrieved 2026-03-21.
- ^ a b Liu, Yuquan; Tong, Hui; Li, Chenyi; Qi, Wei; Zhou, Huamin; Liu, Yang (2025). "Morphotropic Phase Boundary in Irradiated Ferroelectric Polymers". Advanced Materials. 37 (34) 2502099. doi:10.1002/adma.202502099. ISSN 1521-4095.
- ^ Liang, Jiasheng; Liu, Jin; Qiu, Pengfei; Ming, Chen; Zhou, Zhengyang; Gao, Zhiqiang; Zhao, Kunpeng; Chen, Lidong; Shi, Xun (2023-12-19). "Modulation of the morphotropic phase boundary for high-performance ductile thermoelectric materials". Nature Communications. 14 (1): 8442. doi:10.1038/s41467-023-44318-4. ISSN 2041-1723.
- ^ Gao, Fangfang; Zhao, Xuan; Xun, Xiaochen; Huang, Houbing; Shi, Xiaoming; Li, Qi; Liu, Fang; Gao, Peng; Liao, Qingliang; Zhang, Yue (2023-06-13). "Morphotropic Phase Boundary in Polarized Organic Piezoelectric Materials". Physical Review Letters. 130 (24). doi:10.1103/PhysRevLett.130.246801. ISSN 0031-9007.
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