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Phase structure and dielectric property of the ZnNb2O6–(Mg0.3Zn0.7)TiO3 multiphase ceramics

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Abstract

ZnNb2O6 and (Zn0.7Mg0.3)TiO3 multiphase ceramics were prepared by conventional mixed-oxide method combined. The phase structure, structure morphology and dielectric properties of multiphase ceramics were investigated. The results show that ZnNb2O6 accelerates the decomposition of the hexagonal phase (Zn0.7Mg0.3)TiO3 and a structural transition of columbite ZnNb2O6 and rutile to ixiolite ZnTiNb2O8 occurs. ZnNb2O6–(Zn0.7Mg0.3)TiO3 ceramics have uniform morphology, the grain size becomes smaller with the ZnNb2O6 content increasing. ZnTiNb2O8 phase and the uniform morphology improve the properties of ceramics, 0.6ZnNb2O6–0.4(Mg0.3Zn0.7)TiO3 and 0.8ZnNb2O6–0.2(Mg0.3Zn0.7)TiO3 ceramics sintered at 1,000 °C have the best dielectric properties: ε r  = 25.6–26.5, tanδ = 2.9–5.7 × 10−4. Due to their good dielectric properties, ZNMT3 and ZNMT4 ceramics can serve as the promising microwave dielectric capacitor.

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Acknowledgments

The work was supported by National Natural Science Foundation of China, Doctoral Fund of Ministry of Education of China (20096121120004), Natural Science Foundation of Shaanxi Province under Grant (SJ08ZT05-7), and Scientific Research Program Funded by Shaanxi Provincial Education Department (11JK0821).

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  1. Department of Materials Science and Engineering, Xi’an University of Science and Technology, Xi’an, 710054, Peoples Republic of China

    Xiang Chun Liu & Jun Ping Deng

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  1. Xiang Chun Liu
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  2. Jun Ping Deng
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Correspondence to Xiang Chun Liu.

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Liu, X.C., Deng, J.P. Phase structure and dielectric property of the ZnNb2O6–(Mg0.3Zn0.7)TiO3 multiphase ceramics. J Mater Sci: Mater Electron 23, 506–510 (2012). https://doi.org/10.1007/s10854-011-0427-5

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  • DOI: https://doi.org/10.1007/s10854-011-0427-5

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