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Phase evolution, microstructure and microwave dielectric properties of 2Li2O-AO-3WO3 (A=Mg, Zn) composite ceramics

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Abstract

Low-firing microwave dielectric ceramics with compositions of 2Li2O-AO-3WO3 (A=Mg, Zn) were prepared by the solid state reaction method. The sintering behavior, microstructure and microwave dielectric properties of ceramics were investigated. The bulk density, quality factor (Q × f) and relative permittivity (ε r ) of 2Li2O-AO-3WO3 (A=Mg, Zn) ceramics firstly increased, reached a max value and then decreased with increasing the sintering temperature. 2Li2O-MgO-3WO3 ceramics shown a low sintering temperature (~700 °C) and good microwave dielectric properties with Q × f value of 23,582 GHz, ε r of 5.89 and τ f value of −78 ppm/°C. 2Li2O-ZnO-3WO3 ceramics sintered at 675 °C also presented excellent microwave dielectric properties with Q × f = 21,706 GHz, ε r  = 6.76 and τ f  = −94 ppm/°C. Most importantly, 2Li2O-AO-3WO3 (A=Mg, Zn) ceramics illustrated good chemical compatiblity with silver powders, which indicate that they can be used to LTCC multilayer devices.

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Acknowledgements

This work was supported by Natural Science Foundation of China (Nos. 11464009 and 11364012), Natural Science Foundation of Guangxi (Nos. 2015GXNSFDA139033, 2014GXNSFAA118312, 2013GXNSFAA019291 and 2014GXNSFAA118326), Research Start-up Funds Doctor of Guilin University of Technology (Nos. 002401003281 and 002401003282) and Project of Outstanding Young Teachers׳ Training in Higher Education Institutions of Guangxi.

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  1. Guangxi Key Laboratory in Universities of Clean Metallurgy and Comprehensive Utilization for Non-ferrous Metals Resources, Guangxi Ministry-Province Jointly-Constructed Cultivation Base for State Key Laboratory of Processing for Non-ferrous Metal and Featured Materials, Collaborative Innovation Center for Exploration of Hidden Nonferrous Metal Deposits and Development of New Materials in Guangxi, School of Materials Science and Engineering, Guilin University of Technology, Guilin, 541004, China

    Huanfu Zhou, Xianghu Tan, Jin Huang, Kangguo Wang, Wendong Sun & Xiuli Chen

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  1. Huanfu Zhou
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  2. Xianghu Tan
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  3. Jin Huang
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Correspondence to Huanfu Zhou.

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Zhou, H., Tan, X., Huang, J. et al. Phase evolution, microstructure and microwave dielectric properties of 2Li2O-AO-3WO3 (A=Mg, Zn) composite ceramics. J Mater Sci: Mater Electron 28, 11439–11445 (2017). https://doi.org/10.1007/s10854-017-6939-x

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