Enhanced voltage stability of TiO2-based ceramics with colossal permittivity induced by multiple acceptors doping

IF 5.1 2区材料科学 Q1 MATERIALS SCIENCE, CERAMICS

Ceramics International Pub Date : 2025-04-01 DOI:10.1016/j.ceramint.2025.01.039

Yang Yu , Ziyue Zhou , Siyuan Li , Xuan Gao , Yu Feng , Weidong Fei , Qingguo Chen

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Abstract

In view of the demands for colossal permittivity materials in rapidly soaring developments of modern electronics and energy storage, the high dielectric performance co-doped TiO₂ ceramics often suffer from their low voltage stability and poor electrical insulation. Exploring the method of improving the withstand voltage strength and voltage stability for colossal permittivity materials is necessary. In this work, Tb³⁺ was added in (Ta_0.5Tb_xAl_0.5-x)_0.02Ti_0.98O₂ to investigate the effect of defect complex formed by co-dopants on microstructure, permittivity and current density performance. The results indicated that the addition of Tb³⁺ could enhance the permittivity to above 10⁵, featuring excellent frequency-stability. Moreover, the current density of (Ta_0.5Tb_xAl_0.5-x)_0.02Ti_0.98O₂ ceramics with x value of 0.1 was reduced three orders of magnitude. This work provides a new strategy for enhance the permittivity and voltage stability of TiO₂-based CP materials by addition two acceptors with large-radius distinction.

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多受体掺杂增强tio2基大介电常数陶瓷的电压稳定性

鉴于现代电子技术和储能技术的飞速发展对大介电常数材料的需求，高介电性能的共掺杂TiO2陶瓷往往存在电压稳定性低、电绝缘性差的问题。探索提高大介电常数材料耐压强度和电压稳定性的方法是必要的。本文在（Ta0.5TbxAl0.5-x）0.02Ti0.98O2中加入Tb3+，研究共掺杂形成的缺陷复合物对微结构、介电常数和电流密度性能的影响。结果表明，Tb3+的加入可使材料的介电常数提高到105以上，具有良好的频率稳定性。x值为0.1时，（Ta0.5TbxAl0.5-x）0.02Ti0.98O2陶瓷的电流密度降低了3个数量级。本研究为提高tio2基CP材料的介电常数和电压稳定性提供了一种新的策略。

本文章由计算机程序翻译，如有差异，请以英文原文为准。

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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.