Jimin Lin, Jin Qian, Simin Wang, Jinfeng Lin, Yunjing Shi, Guanglong Ge, Yin Hua, Bo Shen, Jiwei Zhai
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引用次数: 0
Abstract
BiFeO3-based ceramics are one of the potential materials expected to replace conventional Pb(Zr,Ti)O3-based ceramics in the field of high-temperature piezoelectricity due to their high Curie temperature (TC). However, the low piezoelectric properties of BiFeO3-based ceramics limit their further development and applications. Here, a synergistic tuning strategy is proposed to enhance the piezoelectric properties of BiFeO3-based ceramics by adjusting the phase configuration near morphotropic phase boundary (MPB) and introducing lattice distortion. Near the MPB, the increased occupation of the T-phase can reduce the domain switch barrier, thereby allowing the dipole to switch more efficiently. Furthermore, enhancing the lattice distortion can increase the intrinsic polarization of ceramics. The above two points serve to enhance the piezoelectric properties of BiFeO3-based ceramics. As a result, 0.7BiFeO3-0.29BaTiO3-0.01Bi0.5K0.5Ti0.5Hf0.5O3 ceramics possesses a high piezoelectric coefficient d33 of 198 ± 5 pC/N, and a high TC of 489 ± 6 °C, while maintaining stable performance across a broad temperature range from 25 to 404 °C. This synergistic modulation strategy provides an idea to optimize the piezoelectric properties of BiFeO3-based ceramics for high-temperature applications.
期刊介绍:
Ceramics International covers the science of advanced ceramic materials. The journal encourages contributions that demonstrate how an understanding of the basic chemical and physical phenomena may direct materials design and stimulate ideas for new or improved processing techniques, in order to obtain materials with desired structural features and properties.
Ceramics International covers oxide and non-oxide ceramics, functional glasses, glass ceramics, amorphous inorganic non-metallic materials (and their combinations with metal and organic materials), in the form of particulates, dense or porous bodies, thin/thick films and laminated, graded and composite structures. Process related topics such as ceramic-ceramic joints or joining ceramics with dissimilar materials, as well as surface finishing and conditioning are also covered. Besides traditional processing techniques, manufacturing routes of interest include innovative procedures benefiting from externally applied stresses, electromagnetic fields and energetic beams, as well as top-down and self-assembly nanotechnology approaches. In addition, the journal welcomes submissions on bio-inspired and bio-enabled materials designs, experimentally validated multi scale modelling and simulation for materials design, and the use of the most advanced chemical and physical characterization techniques of structure, properties and behaviour.
Technologically relevant low-dimensional systems are a particular focus of Ceramics International. These include 0, 1 and 2-D nanomaterials (also covering CNTs, graphene and related materials, and diamond-like carbons), their nanocomposites, as well as nano-hybrids and hierarchical multifunctional nanostructures that might integrate molecular, biological and electronic components.