X9R MLCC用KNbO3-Ca(Ti, Zr)O3陶瓷的介电性能

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

Ceramics International Pub Date : 2025-09-01 DOI:10.1016/j.ceramint.2025.06.202

Byeong-Jae Min , Geun-Soo Lee , San Kwak , Boo-Hyun Choi , Hyun-Ju Choi , Bumjoo Kim , Kyung-Bien Kim , Hoyeon Kim , Sahn Nahm

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引用次数: 0

摘要

0.87KNbO3-0.13CaTiO3 （0.87KN-0.13CT）陶瓷具有与温度无关的介电常数εr，从而满足X9R多层陶瓷电容器（MLCC）的规格要求。该陶瓷具有具有大弛豫特性的纳米畴结构；然而，它不表现出核壳结构。因此，0.87KN-0.13CT陶瓷具有良好的温度稳定εr值可以用其较大的弛豫特性来解释。该陶瓷的εr值相对较小，约为765，这表明该陶瓷的实际应用需要提高εr值。0.87KN-0.13CT陶瓷中少量Ti+4离子被Zr+4离子取代，使εr值升高；因此，0.87KNbO3-0.13Ca(Ti0.94Zr0.06)O3 [KN-C(T0.94Z0.06)]陶瓷的εr值增加了约1016，具有良好的温度稳定性，满足X9R MLCC的要求。采用KN-C（T0.94Z0.06）陶瓷和70Ag-30Pd电极金属制备MLCC。在陶瓷厚膜和电极之间形成了一个清晰的界面。该MLCC满足了X9R MLCC的规格要求，并表现出出色的供电电场稳定性。因此，KN-C（T0.94Z0.06）是X9R MLCC的良好介电材料。

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Dielectric properties of KNbO3-Ca(Ti, Zr)O3 ceramics for X9R MLCC

The 0.87KNbO₃-0.13CaTiO₃ (0.87KN-0.13CT) ceramic provided a temperature-independent dielectric constant (ε_r), thereby fulfilling the specification of the X9R multilayer ceramic capacitor (MLCC). This ceramic has a nanodomain structure with large relaxor properties; however, it does not exhibit the core-shell structure. Therefore, the good temperature-stable ε_r value of the 0.87KN-0.13CT ceramic can be explained by its large relaxor properties. This ceramic has a comparatively small ε_r value of approximately 765, which indicates that an enhancement in the ε_r value is required for the practical application of this ceramic. A few Ti⁺⁴ ions in the 0.87KN-0.13CT ceramic were replaced by Zr⁺⁴ ions to increase the ε_r value; consequently, the 0.87KNbO₃-0.13Ca(Ti_0.94Zr_0.06)O₃ [KN-C(T_0.94Z_0.06)] ceramic exhibited an increased ε_r value of approximately 1016 with good temperature-stability, which satisfies the specification of the X9R MLCC. The MLCC was fabricated utilizing the KN-C(T_0.94Z_0.06) ceramic and a 70Ag-30Pd electrode metal. The MLCC was well developed with a sharp interface between the ceramic thick film and the electrode. This MLCC satisfied the specification of the X9R MLCC and also exhibited outstanding supplied electric field stability. Therefore, the KN-C(T_0.94Z_0.06) is a good dielectric material for the X9R MLCC.

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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.