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Strontium doped CaCu3Ti4O12 ceramics with very low dielectric loss synthesized by the sol–gel method

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Abstract

The Ca site of CaCu3Ti4O12 (CCTO) ceramics doped by strontium (Ca1-xSrxCu3Ti4O12, x = 0.0, 0.1, 0.2, 0.3) were accomplished by a modified sol–gel method and subsequently sintered at 980–1020 °C to improve the dielectric properties and enhance the breakdown electric field. Remarkably, the dielectric loss (tanδ) of the CSCTO ceramics sintered at 1000 °C can be lower than 0.05 in a wide frequency (20 Hz–100 kHz), especially, very low dielectric loss (tanδ) about 0.008 can be obtained in Ca0.9Sr0.1Cu3Ti4O12 ceramic which sintered at 1000 °C measured at 300 Hz. These results indicate that Sr2+ doped at the Ca2+ site of CCTO type ceramic can enhance the applicable properties of CaCu3Ti4O12 and can be used in the future practical researches.

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Acknowledgements

This work was supported by the National Natural Science Foundation of China (NSFC) (No. 11804006), Natural Science Foundation of Shanxi Province (No. 201901D111126 and No. 201901D111117).

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Zhao, J., Sun, L., Cao, E. et al. Strontium doped CaCu3Ti4O12 ceramics with very low dielectric loss synthesized by the sol–gel method. Appl. Phys. A 128, 340 (2022). https://doi.org/10.1007/s00339-022-05452-w

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