Boosting high-temperature piezoelectricity in BiFeO3-based ceramics via synergistic phase boundary and lattice distortion engineering

IF 5.6 2区 材料科学 Q1 MATERIALS SCIENCE, CERAMICS
Jimin Lin, Jin Qian, Simin Wang, Jinfeng Lin, Yunjing Shi, Guanglong Ge, Yin Hua, Bo Shen, Jiwei Zhai
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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.
利用协同相界和晶格畸变工程提高bifeo3基陶瓷的高温压电性
bifeo3基陶瓷由于具有较高的居里温度(TC),有望在高温压电领域取代传统的Pb(Zr,Ti) o3基陶瓷。然而,bifeo3基陶瓷的低压电性能限制了其进一步的发展和应用。本文提出了一种协同调谐策略,通过调整相变相边界(MPB)附近的相结构和引入晶格畸变来提高bifeo3基陶瓷的压电性能。在MPB附近,t相占据的增加可以减少畴切换势垒,从而使偶极子更有效地切换。此外,提高晶格畸变可以提高陶瓷的本征极化。以上两点有助于提高bifeo3基陶瓷的压电性能。结果表明,0.7BiFeO3-0.29BaTiO3-0.01Bi0.5K0.5Ti0.5Hf0.5O3陶瓷具有198±5 pC/N的高压电系数d33和489±6℃的高TC,并且在25 ~ 404℃的宽温度范围内保持稳定的性能。这种协同调制策略为优化高温应用中bifeo3基陶瓷的压电性能提供了一种思路。
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来源期刊
Ceramics International
Ceramics International 工程技术-材料科学:硅酸盐
CiteScore
9.40
自引率
15.40%
发文量
4558
审稿时长
25 days
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.
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