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Preparation and dielectric properties of La doped NBCCTO ceramics

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Abstract

CaCu3Ti4O12 ceramics have great dielectric constant, excellent temperature stability and good frequency stability. However, due to high dielectric loss, its practical application in engineering is hindered. In this paper, Na0.25Bi0.25LaxCa0.5-3x/2Cu3Ti4O12 (NBLCCTO) ceramics were prepared by solid phase synthesis. The effects of sintering temperature and La content on dielectric properties of NBLCCTO ceramics were studied. The results show when the sintering temperature is 1030℃ and La content is 0.05, NBLCCTO ceramics show better dielectric properties. Its dielectric constant has εr = 22,231 at 1 kHz and its dielectric loss is 0.0546 at 10 kHz. Appropriate doping of La can lead to grain refinement and enlarge specific surface area of grain boundary, thus increasing resistivity and reducing dielectric loss. Therefore, NBLCCTO ceramics have lower dielectric loss than Na0.25Bi0.25Ca0.5Cu3Ti4O12 (NBCCTO).

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The datasets generated during and/or analysed during the current study are available from the corresponding author on reasonable request.

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Acknowledgements

We sincerely appreciate Talent Funding Project of Southwest University of Science and Technology, No.21zx7104.

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Authors and Affiliations

  1. State Key Laboratory for Environment-Friendly Energy Materials, Southwest University of Science and Technology, Mianyang, 621010, People’s Republic of China

    Qi Hu, Jiayuan Tang, Yuancheng Teng & Xiaofeng Zhao

  2. School of Materials Science and Engineering, Southwest University of Science and Technology, Mianyang, 621010, People’s Republic of China

    Qi Hu, Jiayuan Tang, Yuancheng Teng & Xiaofeng Zhao

  3. Institute of Physics, Daghestan Federal Research Center, Russian Academy of Sciences (DFRS RAS), 367003, Makhachkala, Russia

    Temirlan Arslanov

  4. Condensed Matter Theory Group, Materials Theory Division, Department of Physics and Astronomy, Uppsala University, Box 516, 75120, Uppsala, Sweden

    Xiaofeng Zhao & Rajeev Ahuja

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Hu, Q., Tang, J., Teng, Y. et al. Preparation and dielectric properties of La doped NBCCTO ceramics. J Electroceram 48, 117–126 (2022). https://doi.org/10.1007/s10832-022-00280-z

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