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Influence of Nd doping on microwave dielectric properties of SrTiO3 ceramics

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Abstract

Sr1−x Nd x TiO3 (x = 0.08–0.14) ceramics were prepared by conventional solid-state methods. The analysis of crystal structure suggested Sr1−x Nd x TiO3 ceramics appeared to form tetragonal perovskite structure. The relationship between charge compensation mechanism, microstructure feature and microwave dielectric properties were investigated. Trivalent Nd3+ substituting Sr2+ could effectively decrease oxygen vacancies. This reduction and relative density were critical to improve Q × f values of Sr1−x Nd x TiO3 ceramics. For ε r values, incorporation of Nd could restrain the rattling of Ti4+ cations and led to the reduction of dielectric constant. The τ f values were strongly influenced by tilting of oxygen octahedral. The τ f values decreased from 883 to 650 ppm/°C with x increasing from 0.08 to 0.14. A better microwave dielectric property was achieved for composition Sr0.92Nd0.08TiO3 at 1460 °C: ε r  = 160, Q × f = 6602 GHz, τ f  = 883 ppm/°C.

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Acknowledgements

This work was supported by Priority Academic Program Development of Jiangsu Higher Education Institutions (PAPD), the Opening Project of the State Key Laboratory of High-Performance Ceramics and Superfine Microstructure (Project No. SKL201309SIC), the College Industrialization Project of Jiangsu Province (JHB2012-12), the Jiangsu Collaborative Innovation Center for Advanced Inorganic Function Composites, the Science and Technology Projects of Guangdong Province (Project No. 2011A091103002).

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Authors and Affiliations

  1. College of Materials Science and Engineering, Nanjing Tech University, Nanjing, 210009, China

    Wenjie Bian, Xiaochi Lu, Yaoyao Li, Chengfa Min, Haikui Zhu, Zhenxiao Fu & Qitu Zhang

  2. Jiangsu Collaborative Innovation Center for Advanced Inorganic Function Composites, Nanjing, 210009, China

    Wenjie Bian, Xiaochi Lu, Yaoyao Li, Chengfa Min & Haikui Zhu

  3. Fenghua Advanced Technology Holding Co Ltd, Zhaoqing, 526000, China

    Wenjie Bian, Xiaochi Lu, Yaoyao Li, Chengfa Min, Haikui Zhu, Zhenxiao Fu & Qitu Zhang

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  1. Wenjie Bian
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  2. Xiaochi Lu
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Correspondence to Qitu Zhang.

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Bian, W., Lu, X., Li, Y. et al. Influence of Nd doping on microwave dielectric properties of SrTiO3 ceramics. J Mater Sci: Mater Electron 29, 2743–2747 (2018). https://doi.org/10.1007/s10854-017-8201-y

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  • DOI: https://doi.org/10.1007/s10854-017-8201-y

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