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Dielectric Properties of Sr-Doped Na0.5Bi0.5TiO3–Ba(1–x)Sr x Ti0.995Zr0.005O3 Ceramics Synthesized by Wet Solid-State Method

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Powder Metallurgy and Metal Ceramics Aims and scope

New dielectric composite ceramics Na0.5Bi0.5TiO3–Ba(1–x)Sr x Ti0.995Zr0.005O3 (NBT–BSTZ) ( x= 0.05, 0.1, 0.2, 0.3) have been fabricated by the wet solid-state route. The effect of Sr content on phase structure and electrical properties has been studied in detail. The X-ray diffraction analysis illustrates that the composites consist of tetragonal perovskite. With increasing Sr content, the ceramic capacitors display larger dielectric constant, better temperature stability, and lower dielectric loss in dielectric behavior. The ceramics with composition x = 0.3 possess a large dielectric constant (εr) of 2522. The temperature coefficient of capacitance of NBT–BSTZ varies from –39% to 36% in the temperature range between 0 and 200°C. The dielectric loss of capacitance is below 0.07 while the Sr content is 0.3 in the whole range of measured temperatures. The results indicate that Sr-doping is an effective method to modulate the temperature stability and dielectric loss of the NBT– BSTZ dielectric ceramics.

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Acknowledgements

This work is funded by the National Natural Science Foundation of China (Grant Nos. 51302061 and 51308179), Natural Science Foundation of Hebei province (Grant Nos. E2014201076 and E2016201179), and Postgraduate’s Innovation Fund Project of Hebei University (Grant No. X2016084).

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Authors and Affiliations

  1. Key Laboratory of Analytical Science and Technology of Hebei Province, College of Chemistry and Environmental Science, Hebei University, Baoding, 071002, China

    Haiyan Cheng, Aizhen Song, Miao Liang, Jiali Li, Ruijie Duan, Xianling Wang, Chunxia Zhao & Jing Wang

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  1. Haiyan Cheng
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  2. Aizhen Song
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Correspondence to Jing Wang.

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Published in Poroshkovaya Metallurgiya, Vol. 57, Nos. 1–2 (519), pp. 99–106, 2018.

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Cheng, H., Song, A., Liang, M. et al. Dielectric Properties of Sr-Doped Na0.5Bi0.5TiO3–Ba(1–x)Sr x Ti0.995Zr0.005O3 Ceramics Synthesized by Wet Solid-State Method. Powder Metall Met Ceram 57, 75–81 (2018). https://doi.org/10.1007/s11106-018-9957-1

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