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Research Article | Open Access

Structure, electric, and dielectric properties of (Sr0.7Ca0.3)1.02(Zr0.95−xTi0.05Mnx)O3+δ ceramics for BME-MLCCs application

Qingyang Pang1,2, Ying Chen1,2,3( ), Zhixiang Wang1,2,4,5, Bin Zhou1, Xin Li1, Chao Mu6, Guangping Gu6, Genshui Wang1,2,4,5( )
Key Laboratory of Inorganic Functional Materials and Devices, Shanghai Institute of Ceramics, Chinese Academy of Sciences, Shanghai 201800, China
University of Chinese Academy of Sciences, Beijing 100049, China
National Key Laboratory of Materials for Integrated Circuits, Shanghai Institute of Micro-system and Information Technology, Chinese Academy of Sciences, Shanghai 200050, China
Hangzhou Institute for Advanced Study, University of Chinese Academy of Sciences, Hangzhou 310024, China
School of Chemistry and Materials Science, Hangzhou Institute for Advanced Study, University of Chinese Academy of Sciences, Hangzhou 310024, China
China Zhenhua Xinyun Electronic Components Co., Ltd., Guiyang 550018, China
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Abstract

Zirconate-based dielectric ceramics are potential materials for base metal electrode multilayer ceramic capacitors (BME-MLCCs) due to their exceptional chemical and thermal stability, as well as excellent dielectric properties. In this work, (Sr0.7Ca0.3)1.02(Zr0.95−xTi0.05Mnx)O3+δ (SCZTM, 0 ≤ x ≤ 0.05) ceramics with two coexisting phases were prepared using a solid-state reaction method in a reducing atmosphere. This study investigates the impact of Mn doping on sintering temperature, microstructure, and electrical properties of SCZTM ceramics. Mn doping can reduce the sintering temperature from 1450 to 1300 °C. The impact of Mn doping on the structure and phonon vibration is minimal, resulting in a negligible effect on the intrinsic loss. The valence states of Mn ions and defects were characterized by X-ray photoelectron spectroscopy (XPS) and thermally stimulated depolarization current (TSDC) analysis. The results demonstrate the significant role of Mn doping in nonintrinsic loss. Due to the decrease in the concentration of oxygen vacancies ( VO⋅⋅), SCZTM (x = 0.01) ceramics exhibit attractive properties: resistivity (ρ) = 8.93×1014 Ω·cm, dielectric constant (εr) = 36.16, dielectric loss (tanδ) = 2.43×10–4, temperature dependence of dielectric constant (τε) = 15.44 ppm/°C (@−55–200 °C, 1 MHz), Q×f = 30,257 GHz (@6.12 GHz), and temperature coefficient of resonant frequency (τf) = –9.9 ppm/°C. SCZTM (x = 0.01) ceramic powders were used to successfully fabricate Ni-based multilayer ceramic capacitors (MLCCs) with a high insulation resistance of IR ≥ 39.6 TΩ, an ultralow dielectric loss of tanδ = 0.2×10–4, and a wide operating temperature range (temperature coefficient of capacitance (Tcc) = 10.88 ppm/°C, @−55–200 °C, 1 MHz). SCZTM ceramics exhibit properties that make them suitable for use as BME-MLCC materials with potential market applications.

Keywords

dielectric propertiesreducing atmospheredefectsmultilayer structure

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Journal of Advanced Ceramics
Volume 13 Issue 9,
September 2024
Pages 1382-1393
DOI: 10.26599/JAC.2024.9220943
Cite this article:
Pang Q, Chen Y, Wang Z, et al. Structure, electric, and dielectric properties of (Sr0.7Ca0.3)1.02(Zr0.95−xTi0.05Mnx)O3+δ ceramics for BME-MLCCs application. Journal of Advanced Ceramics, 2024, 13(9): 1382-1393. https://doi.org/10.26599/JAC.2024.9220943

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Received: 23 April 2024
Revised: 07 June 2024
Accepted: 10 July 2024
Published: 29 September 2024
© The Author(s) 2024.

This is an open access article under the terms of the Creative Commons Attribution 4.0 International License (CC BY 4.0, http://creativecommons.org/licenses/by/4.0/).
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