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Microwave dielectric properties of Ba4LaTiNb3−x Ta x O15 ceramics

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Abstract

High dielectric constant and low loss ceramics in the system Ba4LaTiNb3−x Ta x O15 (x = 0–3) have been prepared by conventional solid-state ceramic route. Ba4LaTiNb3−x Ta x O15 solid solutions adopted A5B4O15 cation-deficient hexagonal perovskite structure for all compositions. The materials were characterized at microwave frequencies. They show a linear variation of dielectric properties with the value of x. Their dielectric constant varies from 53.1 to 42.3, quality factor Qu × f from 18,790 to 28,070 GHz and temperature variation of resonant frequency from +94.3 to +33.1 ppm/°C as the value of x increases.

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Acknowledgments

This work was partially supported by Natural Science Foundation of China (NSFC No.20571059 and No.50572078), the Project-sponsored by SRF for ROCS, SEM. This work was also financially supported by ICDD Grant-in-Aid project under Grant No.05–005 and 06–006, and Program for New Century Excellent Talents in University (NCET-06–0656), Ministry of Education, China.

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Authors and Affiliations

  1. Department of Applied Chemistry, Wuhan University of Technology, Wuhan, 430070, P.R. China

    Dongyun Gui, Hui Zhang, Liang Fang & Lihui Xue

  2. State Key Lab. of Advanced Technology for Materials Synthesis and Processing, Wuhan University of Technology, Wuhan, 430070, P.R. China

    Dongyun Gui, Hui Zhang, Liang Fang & Lihui Xue

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  1. Dongyun Gui
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  2. Hui Zhang
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  3. Liang Fang
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Correspondence to Liang Fang.

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Gui, D., Zhang, H., Fang, L. et al. Microwave dielectric properties of Ba4LaTiNb3−x Ta x O15 ceramics. J Mater Sci: Mater Electron 19, 543–546 (2008). https://doi.org/10.1007/s10854-007-9383-5

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  • DOI: https://doi.org/10.1007/s10854-007-9383-5

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