Sc3+/Zr4+共取代扩大CCTO陶瓷的稳定性范围

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

Ceramics International Pub Date : 2025-05-01 DOI:10.1016/j.ceramint.2025.01.527

Ilyas Jalafi, Fatima Chaou, Karim Chourti, Mohamed Chokri, Wassima EL Hadouchi, El Hassan Yahakoub, Amine Bendahhou, Soufian EL Barkany, Mohamed Abou-Salama

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引用次数: 0

摘要

本研究考察了Sc3+和Zr4+离子对CCTO陶瓷介电性能的影响。采用经典陶瓷法制备了组分为Ca(1-x)Sc2x/ 3cu3ti3.97 zr0.030 o12 （x = 0.025, 0.05, 0.075）的样品。XRD证实了掺杂样品的初生CCTO相和少量次级相，SEM显示掺杂样品的晶粒尺寸减小。介电测量表明介电常数很高(ε' >；5 × 10³)，频率范围宽，介质损耗低。x = 0.05样品表现出优异的性能，具有最小的介电损耗（在20°C时tanδ = 0.012）和稳定的介电性能（Δε'≤±15%），是x9r型电容器的理想选择。这些结果与内势垒层电容器（IBLC）模型一致，突出了掺杂CCTO在高级电容器应用中的潜力。

本文章由计算机程序翻译，如有差异，请以英文原文为准。

Expansion of the stability range of the CaCu3Ti4O12 (CCTO) ceramics through Co-substitution with Sc3+/Zr4+

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Expansion of the stability range of the CaCu3Ti4O12 (CCTO) ceramics through Co-substitution with Sc3+/Zr4+

This study examines the effects of Sc³⁺ and Zr⁴⁺ ions on the dielectric properties of CaCu₃Ti₄O₁₂ (CCTO) ceramics. Samples with the composition Ca_(1-x)Sc_2x/3Cu₃Ti_3.97Zr_0.03O₁₂ (x = 0.025, 0.05, 0.075) were synthesized via the classical ceramic method. XRD confirmed the primary CCTO phase with minor secondary phases, while SEM revealed reduced grain sizes in doped samples. Dielectric measurements showed high dielectric constants (ε' > 5 × 10³) across a wide frequency range and low dielectric losses. The x = 0.05 sample exhibited superior performance, with minimal dielectric loss (tanδ = 0.012 at 20 °C) and stable dielectric properties (Δε' ≤ ±15 %), ideal for X9R-type capacitors. These results align with the internal barrier layer capacitor (IBLC) model, highlighting the potential of doped CCTO for advanced capacitor applications.

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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.