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Dielectric properties and microstructure of CCTO/SnO2 composite ceramics prepared by solid-state method

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Abstract

The CCTO/SnO2 composite ceramics were fabricated by sintering at 1040°C for 8 h. The FESEM found that the grain size decreased sharply when the SnO2 addition amount reached 15 mol%. The dielectric spectra confirmed that the addition of SnO2 helps to improve the dielectric properties of CCTO, and the dielectric constants of 20 mol% SnO2 reached 1.74 × 106 and 4.2 × 105 at 20 Hz and 1 kHz, respectively. XPS found the coexistence of Cu+ and Ti3+ related to the defect compensation mechanism. Impedance spectroscopy confirms that the addition of SnO2 helps to improve the semiconductivity of CCTO, thereby enhancing the dielectric properties of CCTO.

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Data availability

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

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Acknowledgments

This work was supported by the Natural Science Foundation of China (51562037) and Yunnan University Graduate Research and Innovation Fund (2020Z41). The authors thank Advanced Analysis and Measurement Center of Yunnan University for the sample testing service.

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  1. Jingchang Zhao

    Present address: School of Materials and Energy, Yunnan University, Kunming, 650091, People’s Republic of China

Authors and Affiliations

  1. School of Materials and Energy, Yunnan University, Kunming, 650091, People’s Republic of China

    Yong Guo & Junlang Tan

Authors
  1. Yong Guo
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  2. Junlang Tan
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Contributions

JZ: Conceptualization, Methodology, Software, Funding acquisition; YG: Data curation, Writing—Original draft preparation, Visualization, Investigation, Writing—Reviewing and Editing; JT: Supervision, Software, Validation.

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Correspondence to Jingchang Zhao.

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Guo, Y., Tan, J. & Zhao, J. Dielectric properties and microstructure of CCTO/SnO2 composite ceramics prepared by solid-state method. MRS Communications 12, 734–737 (2022). https://doi.org/10.1557/s43579-022-00220-6

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