Study on curie temperature mechanism and electrical properties of BiFeO3-doped (Ba,Ca) (Ti,Sn)O3 ceramics

IF 5.1 2区材料科学 Q1 MATERIALS SCIENCE, CERAMICS Ceramics International Pub Date : 2024-09-21 DOI:10.1016/j.ceramint.2024.09.282

Tengfei Yu , Rongrong Chen , Xiang Ji , Zhijun Fu , Subing Jiang , Meizhen Gao

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Abstract

In this study, we investigated the phase structure, Curie temperature, dielectric properties, piezoelectricity, and energy-storage properties of BiFeO₃ (BFO)-modified (Ba_0.95Ca_0.05) (Ti_0.89Sn_0.11)O₃ (BCTSO) ceramics using both experimental and theoretical methods. The results indicated that the lattice distortion and chaotic distribution of the local charge increased with the BFO content, resulting in a phase transition and transformation from a ferroelectric to a relaxing ferroelectric. First-principles calculations revealed that the Curie temperature decreased with increasing BFO content, primarily because of an increase in the ground state energy. The variation in the permittivity of the BCTSO-xBFO ceramics with temperature and frequency is affected by the phase structure and Maxwell-Wagner interface polarisation, respectively. The electrical modulus measurements indicated that BCTSO-xBFO exhibited non-Debye-type dielectric relaxation for x = 0.0, 0.1, and 0.5 %, whereas BCTSO-xBFO showed Debye-type dielectric relaxation for x = 0.9%.

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掺杂 BiFeO3（Ba,Ca）（Ti,Sn）O3 陶瓷的居里温度机理和电气性能研究

本研究采用实验和理论方法研究了 BiFeO3 (BFO) 改性 (Ba0.95Ca0.05) (Ti0.89Sn0.11)O3 (BCTSO) 陶瓷的相结构、居里温度、介电性质、压电性和储能特性。结果表明，晶格畸变和局部电荷的混乱分布随着 BFO 含量的增加而增大，导致了相变和从铁电到弛豫铁电的转变。第一原理计算显示，居里温度随 BFO 含量的增加而降低，这主要是由于基态能量的增加。BCTSO-xBFO 陶瓷的介电常数随温度和频率的变化分别受到相结构和麦克斯韦-瓦格纳界面极化的影响。电模量测量结果表明，BCTSO-xBFO 在 x = 0.0%、0.1% 和 0.5% 时表现出非德拜型介电弛豫，而 BCTSO-xBFO 在 x = 0.9% 时表现出德拜型介电弛豫。

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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.