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Sintering characteristics and microwave dielectric properties of a new temperature-stable ceramic of Ce0.5Sm0.5O1.75

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Abstract

The novel temperature-stable microwave dielectric ceramics of Ce0.5Sm0.5O1.75 were fabricated via the mixed oxide reaction method, with the detail information including crystal phase, microstructure, sintering behavior and microwave dielectric properties being systematically investigated. For crystal phase, all the diffraction patterns were indexed as cubic fluorite-type structure with Fm-3m (225) space group and exhibited a single phase with no obvious peak position shift. The grain growth was analyzed by density and average grain size. For microwave dielectric properties of Ce0.5Sm0.5O1.75 ceramics, the dielectric constant value (εr) was dependent on density. The quality factors (Q × f values) were investigated considered with average grain size. And the temperature coefficient of resonant frequency (τf value) had no significant change during the sintering temperature range, which was found consistent with the trend of the dielectric constant value. The Ce0.5Sm0.5O1.75 ceramics sintered at 1475 °C for 4 h exhibited good microwave dielectric performances with εr = 18.21, Q × f = 70,500 GHz, and τf = − 16.4 ppm/°C.

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Acknowledgements

This work is supported by the projects from the Fundamental Research Funds for the Central Universities under Grant No. 2020ZDPYMS12.

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Authors and Affiliations

  1. School of Materials Science and Physics, China University of Mining and Technology, Xuzhou, 221116, China

    Ying Wang, Tian-Liang Tang, Jing-Yu Deng, Ming-Xue Li, Li-Wei Shi & Wang-Suo Xia

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  1. Ying Wang
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  2. Tian-Liang Tang
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  3. Jing-Yu Deng
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  4. Ming-Xue Li
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Correspondence to Ying Wang.

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Wang, Y., Tang, TL., Deng, JY. et al. Sintering characteristics and microwave dielectric properties of a new temperature-stable ceramic of Ce0.5Sm0.5O1.75. J Mater Sci: Mater Electron 31, 19130–19135 (2020). https://doi.org/10.1007/s10854-020-04449-6

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