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Tuning the microwave dielectric properties of La0.97Sm0.03(Mg0.5Sn0.5)O3 by adding Ca0.8Sm0.4/3TiO3

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Abstract

The influence of sintering temperature on the microwave dielectric properties and microstructure of the (1 − y)La0.97Sm0.03(Mg0.5Sn0.5)O3–yCa0.8Sm0.4/3TiO3 ceramic system were investigated with a view to their application in microwave devices. The (1 − y)La0.97Sm0.03(Mg0.5Sn0.5)O3–yCa0.8Sm0.4/3TiO3 ceramic systems were prepared using the conventional solid-state method. The X-ray diffraction (XRD) patterns of the (1 − y)La0.97Sm0.03(Mg0.5Sn0.5)O3–yCa0.8Sm0.4/3TiO3 ceramic system did not significantly vary with sintering temperature. The XRD patterns of the (1 − y)La0.97Sm0.03(Mg0.5Sn0.5)O3–yCa0.8Sm0.4/3TiO3 ceramic system shifted to higher angle as y increased. A dielectric constant of 37.5, a quality factor (Q × f) of 40,300 GHz, and a temperature coefficient of resonant frequency of 2.4 ppm/°C were obtained when the 0.425La0.97Sm0.03(Mg0.5Sn0.5)O3–0.575Ca0.8Sm0.4/3TiO3 ceramic system was sintered at 1,600 °C for 4 h.

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Acknowledgments

This work was supported by the National Science Council in Taiwan under Grant NSC 100-2622-E-262-007.

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  1. Department of Electrical Engineering, Lunghwa University of Science and Technology, Gueishan Shiang, Taoyuan County, Taiwan

    Yih-Chien Chen & Wei-Cheng Lee

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  1. Yih-Chien Chen
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  2. Wei-Cheng Lee
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Correspondence to Yih-Chien Chen.

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Chen, YC., Lee, WC. Tuning the microwave dielectric properties of La0.97Sm0.03(Mg0.5Sn0.5)O3 by adding Ca0.8Sm0.4/3TiO3 . J Mater Sci: Mater Electron 24, 345–351 (2013). https://doi.org/10.1007/s10854-012-0752-3

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  • DOI: https://doi.org/10.1007/s10854-012-0752-3

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