晶粒细化对b位掺杂batio3基高熵陶瓷介电性能的影响

IF 5.6 2区材料科学 Q1 MATERIALS SCIENCE, CERAMICS

Ceramics International Pub Date : 2025-08-01 DOI:10.1016/j.ceramint.2025.04.325

Xinyu Ping , Xiaoyu Pan , Bin Meng , Qingqing Yang , Wenlong Zhang

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引用次数: 0

摘要

为了进一步实现储能器件的小型化和集成化，必须提高batio3基陶瓷电容器的介电性能。本研究结合晶粒细化和高熵效应两种优化策略，设计了基于batio3的高熵纳米晶陶瓷：Ba(Ti0.2Zr0.2Nb0.2Y0.2Sn0.2)O3 （HEO1）和Ba(Ti0.2Zr0.2Nb0.2Yb0.2Hf0.2)O3 （HEO2）。这些陶瓷采用快速热压烧结（FHPS）合成，得到HEO1-FHPS和HEO2-FHPS样品，两者都具有纯钙钛矿结构，类似于传统固相烧结（CS）制备的样品，即HEO1-CS和HEO2-CS。HEO1-FHPS（96.18%）和HEO2-FHPS（98.34%）样品的相对密度高于HEO1-CS（95.47%）和HEO2-CS（95.40%）样品。此外，HEO1-FHPS （0.092 μm）和HEO2-FHPS （0.084 μm）的晶粒尺寸明显小于HEO1-CS （2.48 μm）和HEO2-CS （2.91 μm）。HEO1和HEO2的高相对密度和小晶粒尺寸提高了它们的最大介电常数，提高了居里温度，增强了介电稳定性。此外，与HEO1-CS和HEO2-CS相比，HEO1-FHPS和HEO2-FHPS具有更高的临界电场强度（359和389 kV/cm），更高的可回收能量密度（0.40和0.88 J/cm3）和更高的储能效率（67.6%和70.4%）。这些发现为开发具有增强介电性能的batio3基陶瓷提供了一种有希望的方法。

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Influence of grain refinement on the dielectric properties of B-site doped BaTiO3-based high-entropy ceramics

The dielectric performance of BaTiO₃-based ceramic capacitors must be improved for further miniaturization and integration of energy storage devices. This study combines two optimization strategies, the grain refinement and high-entropy effect, to design BaTiO₃-based high-entropy nanocrystalline ceramics: Ba(Ti_0.2Zr_0.2Nb_0.2Y_0.2Sn_0.2)O₃ (HEO1) and Ba(Ti_0.2Zr_0.2Nb_0.2Yb_0.2Hf_0.2)O₃ (HEO2). These ceramics were synthesized using fast hot-pressing sintering (FHPS), yielding HEO1-FHPS and HEO2-FHPS samples, both of which exhibit a pure perovskite structure, similar to that of samples fabricated via conventional solid-state sintering (CS), namely HEO1-CS and HEO2-CS. The relative densities of the HEO1-FHPS (96.18 %) and HEO2-FHPS (98.34 %) samples are higher than those of HEO1-CS (95.47 %) and HEO2-CS (95.40 %). In addition, the grain sizes of HEO1-FHPS (0.092 μm) and HEO2-FHPS (0.084 μm) are notably smaller than those of HEO1-CS (2.48 μm) and HEO2-CS (2.91 μm). The high relative density and small grain size of HEO1 and HEO2 improve their maximum permittivity, increase the Curie temperature and enhance dielectric stability. Furthermore, compared with HEO1-CS and HEO2-CS, HEO1-FHPS and HEO2-FHPS exhibit higher critical electric field strengths (359 and 389 kV/cm), greater recoverable energy densities (0.40 and 0.88 J/cm³) and improved energy storage efficiencies (69.6 % and 70.4 %). These findings provide a promising approach for developing BaTiO₃-based ceramics with enhanced dielectric performance.

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来源期刊

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.