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A Low-Temperature Firing and Low-Loss SrBi2TeO7 Microwave Dielectric Ceramic for LTCC Applications

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Abstract

The structural characteristics and microwave dielectric properties of SrBi2TeO7 ceramics intended for low-temperature co-fired ceramic (LTCC) applications were investigated. Comprehensive analyses were conducted using x-ray diffraction, structural refinement, transmission electron microscopy, Raman spectroscopy, and x-ray photoelectron spectroscopy. The findings demonstrated that SrBi2TeO7 ceramics possess a pure cubic structure. Scanning electron microscopy characterizes the grain microstructure, revealing a relative density of 95.5% for SrBi2TeO7 ceramic. Optimal microwave dielectric properties were achieved for SrBi2TeO7 ceramics calcined at 765°C, displaying a relative permittivity (εr) of 24.96, a Q × f value of 25,898 GHz (f = 6.6 GHz), and a temperature coefficient of resonant frequency (τf) of –80.7 ppm/°C. The combination of low sintering temperature and minimal dielectric loss renders these ceramics advantageous for utilization in LTCC materials.

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Acknowledgments

This work was supported by the graduate scientific research innovation project of Shaoyang University (Grant No. CX2022SY035) and the National Natural Science Foundation of China (Grant No. 52102123).

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Authors and Affiliations

  1. College of Information Engineering, Shaoyang University, Shaoyang, 422000, China

    Yingxiang Li, Deyin Liang, Zhenjun Qing, Sen Peng & Tingting Liao

  2. State Key Laboratory of Electronic Thin Films and Integrated Devices, University of Electronic Science and Technology of China, Chengdu, 611731, China

    Bin Tang, Feng Si, Zixuan Fang & Jingjing Chen

  3. Sichuan Province Key Laboratory of Information Materials and Devices Application, College of Optoelectronic Engineering, Chengdu University of Information Technology, Chengdu, 610225, China

    Xing Zhang & Zhe Xiong

  4. School of Civil Engineering and Geomatics, Southwest Petroleum University, Chengdu, 610500, China

    Fei Wang

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  1. Yingxiang Li
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Li, Y., Liang, D., Zhang, X. et al. A Low-Temperature Firing and Low-Loss SrBi2TeO7 Microwave Dielectric Ceramic for LTCC Applications. J. Electron. Mater. 52, 7438–7446 (2023). https://doi.org/10.1007/s11664-023-10664-8

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