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Microstructures and microwave dielectric properties of Mg2SiO4–Ca0.9Sr0.1TiO3 ceramics

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Abstract

The microstructures and microwave dielectric properties of (1 − x)Mg2SiO4–xCa0.9Sr0.1TiO3 (x = 0.05–0.08) composite ceramics, prepared via a conventional solid-state ceramic route, were investigated. As expected, an increase in sintering temperature effectively promoted densification and enhanced the dielectric properties of the (1 − x)Mg2SiO4–xCa0.9Sr0.1TiO3 ceramics used in this study. As the amount of Ca0.9Sr0.1TiO3 increased, temperature coefficient of resonant frequency (τ f ) increased; with a near-zero τ f obtained for samples where x = 0.06. The optimal microwave dielectric properties, a dielectric constant (ε r ) of 8.01, high quality factor (Q × f) of 58,389 GHz (at 14.6 GHz) and a τ f of −3.62 ppm/°C, were obtained for 0.94Mg2SiO4–0.06Ca0.9Sr0.1TiO3 sintered at 1,440 °C for 3 h.

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Acknowledgments

This work was supported by the Priority Academic Program Development of Jiangsu Higher Education Institutions and Program for Changjiang Scholars and Innovative Research Team in University (PCSIRT), IRT1146.

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Authors and Affiliations

  1. College of Materials Science and Engineering, Nanjing Tech University, No. 5 Xinmofan Road, Nanjing, 210009, China

    Ling Liu, Yongbao Feng, Tai Qiu & Xiaoyun Li

  2. Economic Development Zone, Nanjing Sanle Electronic Information Industry Group Co., Ltd, No. 5 Guangming Road, Pukou, Nanjing, 211800, China

    Yongbao Feng

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  1. Ling Liu
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  2. Yongbao Feng
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  3. Tai Qiu
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  4. Xiaoyun Li
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Correspondence to Yongbao Feng.

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Liu, L., Feng, Y., Qiu, T. et al. Microstructures and microwave dielectric properties of Mg2SiO4–Ca0.9Sr0.1TiO3 ceramics. J Mater Sci: Mater Electron 26, 1316–1321 (2015). https://doi.org/10.1007/s10854-014-2540-8

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  • DOI: https://doi.org/10.1007/s10854-014-2540-8

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