Novel Low-Firing Microwave Dielectric Ceramic LiCa3MgV3O12 with Low Dielectric Loss

Authors

  • Liang Fang,

    Corresponding author
    • State Key Laboratory Breeding Base of Nonferrous metals and specific Materials Processing, Key laboratory of Nonferrous Materials and New Processing Technology, Ministry of Education, Guilin University of Technology, Guilin, China
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  • Congxue Su,

    1. State Key Laboratory Breeding Base of Nonferrous metals and specific Materials Processing, Key laboratory of Nonferrous Materials and New Processing Technology, Ministry of Education, Guilin University of Technology, Guilin, China
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  • Huanfu Zhou,

    1. State Key Laboratory Breeding Base of Nonferrous metals and specific Materials Processing, Key laboratory of Nonferrous Materials and New Processing Technology, Ministry of Education, Guilin University of Technology, Guilin, China
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  • Zhenhai Wei,

    1. State Key Laboratory Breeding Base of Nonferrous metals and specific Materials Processing, Key laboratory of Nonferrous Materials and New Processing Technology, Ministry of Education, Guilin University of Technology, Guilin, China
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  • Hui Zhang

    1. State Key Laboratory Breeding Base of Nonferrous metals and specific Materials Processing, Key laboratory of Nonferrous Materials and New Processing Technology, Ministry of Education, Guilin University of Technology, Guilin, China
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Author to whom correspondence should be addressed. e-mail: fanglianggl001@yahoo.cn

Abstract

Novel low temperature firing microwave dielectric ceramic LiCa3MgV3O12 (LCMV) with garnet structure was fabricated by the conventional solid-state reaction method. The phase purity, microstructure, and microwave dielectric properties were investigated. The densification temperature for the LCMV ceramic is 900°C. LCMV ceramic possessed εr = 10.5, Qu × = 74 700 GHz, and τf = −61 ppm/°C. Furthermore, 0.90LiCa3MgV3O12–0.10CaTiO3 ceramic sintered at 925°C for 4 h exhibited good properties of εr = 12.4, Qu × = 57 600 GHz, and τf = 2.7 ppm/°C. The LCMV ceramic could be compatible with Ag electrode, which makes it a promising ceramic for LTCC technology application.

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