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Temperature stable microwave dielectric ceramics in LiCa3−x Sr x MgV3O12 ceramics

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Abstract

A series of LiCa3−x Sr x MgV3O12 (x = 0.1, 0.2, 0.3) ceramics with enhanced microwave dielectric properties were prepared by the conventional solid-state reaction method. Effects of Sr2+ ions substitution for Ca2+ ions on the structure, sintering behavior, and microwave dielectric properties of LiCa3MgV3O12 were investigated. X-ray diffraction data shows that within the detectable limit of the instrument, single-phase solid solution with cubic structure could be obtained in the range of x = 0.1–0.3, while Sr4V2O9 phase appeared at x = 0.4. The microwave dielectric properties could be tuned by composition adjustment. A near-zero τ f value of −9.7 ppm/oC was achieved in the x = 0.3 sample along with a permittivity of 12.0, a Q × f value of 48,400 GHz (at 10.9 GHz) when sintered at 895 °C. XRD analysis and EDS analysis of the co-fired LiCa2.7Sr0.3MgV3O12 with 20 wt% Ag indicates the chemical compatibility with silver at 895 °C.

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Acknowledgments

This research was supported by Natural Science Foundation of China (Nos. 21261007, 21561008, and 51502047), the Natural Science Foundation of Guangxi Zhuang Autonomous Region (Nos. 2015GXNSFBA139234 and 2015GXNSFFA139003), Project of Department of Science and Technology of Guangxi (No. 114122005-28), and Projects of Education Department of Guangxi Zhuang Autonomous Region (Nos. YB2014160, KY2015YB341, and KY2015YB122).

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Authors and Affiliations

  1. College of Information Science and Engineering, Guilin University of Technology, Guilin, 541004, China

    Chunchun Li

  2. State Key Laboratory Breeding Base of Nonferrous Metals and Specific Materials Processing, Guangxi Universities Key Laboratory of Non-ferrous Metal Oxide Electronic Functional Materials and Devices, College of Material Science and Engineering, Guilin University of Technology, Guilin, 541004, China

    Chunchun Li, Huaicheng Xiang & Liang Fang

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  1. Chunchun Li
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  2. Huaicheng Xiang
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  3. Liang Fang
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Correspondence to Chunchun Li or Liang Fang.

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Li, C., Xiang, H. & Fang, L. Temperature stable microwave dielectric ceramics in LiCa3−x Sr x MgV3O12 ceramics. J Mater Sci: Mater Electron 27, 10958–10962 (2016). https://doi.org/10.1007/s10854-016-5210-1

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  • DOI: https://doi.org/10.1007/s10854-016-5210-1

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