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Microwave dielectric properties of non-stoichiometric Sr1 + xNd2Al2O7 + x ceramic prepared by reaction-sintering process

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Abstract

Sr1 + xNd2Al2O7 + x (0 ≤ x ≤ 0.04) ceramics were prepared using a more concise reaction-sintering method. The reaction-sintering (RS) method could reduce the number of ceramic preparation steps, which in turn reduces the factors that cause degradation of the microwave dielectric properties due to the sophisticated process fluctuations in the sintering process. X-ray diffraction patterns show that the sample is composed of a pure SrNd2Al2O7 single phase, whereas scanning electron microscope images display that the microscopic morphology of the sample is almost the same as that of solid-phase sintering. As x = 0.03, Sr1 + xNd2Al2O7 + x ceramic sintered at 1600 °C exhibited good microwave dielectric performances with εr = 18.53, Q × f = 68,600 GHz, τf = − 3.49 ppm/°C, and ρ = 6.03 g/cm3, which were better than those of the solid-state reaction method, indicating that the RS method has a lower cost and is simpler for preparing microwave dielectric ceramics with good performances.

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All data generated or analyzed during this study are included in this published article (and its supplementary information files).

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Funding

This work was supported by the Natural Science Foundation of China (Grant Nos. 61761015 and 11664008) and the Natural Science Foundation of Guangxi (Grant Nos. 2017GXNSFFA198011, 2018GXNSFFA050001, and 2017GXNSFDA198027) and High-Level Innovation Team and Outstanding Scholar Program of Guangxi Institutes.

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Authors and Affiliations

  1. Key Laboratory of Nonferrous Materials and New Processing Technology, Ministry of Education, School of Materials Science and Engineering, Guilin University of Technology, Guilin, 541004, China

    Yaqi Xiao, Xiaowen Luan, Xi Wang, Guoqiang He, Xin Qu, Shan Deng, Kaiyang Liu, Jinghang Qian, Xiuli Chen & Huanfu Zhou

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  1. Yaqi Xiao
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Contributions

All authors contributed to the study conception and design. Material preparation, data collection, and analysis were performed by YX and XL. The first draft of the manuscript was written by YX and all authors commented on previous versions of the manuscript. All authors read and approved the final manuscript.

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Correspondence to Xiuli Chen or Huanfu Zhou.

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Xiao, Y., Luan, X., Wang, X. et al. Microwave dielectric properties of non-stoichiometric Sr1 + xNd2Al2O7 + x ceramic prepared by reaction-sintering process. J Mater Sci: Mater Electron 33, 21512–21518 (2022). https://doi.org/10.1007/s10854-022-08942-y

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