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Thermal stability, phase composition and microwave dielectric properties of (3MgO–Al2O3–3TiO2)–CaTiO3 ceramics

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Abstract

(1 − x)(3MgO–Al2O3–3TiO2)–xCaTiO3 (0.1 ≤ x ≤ 0.3) composite ceramics were synthesized by a conventional solid state reaction method. The effects of CaTiO3 addition on the phase composition, microstructure and microwave dielectric properties of 3MgO–Al2O3–3TiO2 ceramics were investigated. X-ray diffraction patterns showed that the composite ceramics were made up of MgAl2O4, MgTiO3, MgTi2O5, CaTiO3 and a small amount of TiO2 phases. The addition of CaTiO3 could adjust the τ f and improve the ε r values of ceramics. The optimum microwave dielectric properties of ε r  = 17.6, Q × f = 36606 GHz and τ f  = +4.63 ppm/°C were obtained for the 0.8(3MgO–Al2O3–3TiO2) – 0.2CaTiO3 ceramics sintered at 1325 °C, which indicates that this material is a suitable material for microwave devices.

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Acknowledgements

This work was supported by the Natural Science Foundation of China (Nos. 11464009 and 11364012), Natural Science Foundation of Guangxi (No. 2015GXNSFDA139033), and Project of Outstanding Young Teachers’ Training in Higher Education Institutions of Guangxi.

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Authors and Affiliations

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

    Huanfu Zhou, Jin Huang, Xianghu Tan, Kangguo Wang, Wendong Sun & Hong Ruan

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  1. Huanfu Zhou
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  2. Jin Huang
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  3. Xianghu Tan
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  6. Hong Ruan
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Correspondence to Huanfu Zhou or Hong Ruan.

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Zhou, H., Huang, J., Tan, X. et al. Thermal stability, phase composition and microwave dielectric properties of (3MgO–Al2O3–3TiO2)–CaTiO3 ceramics. J Mater Sci: Mater Electron 28, 17009–17013 (2017). https://doi.org/10.1007/s10854-017-7623-x

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