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Effect of Ba2+ doping on microstructure and electric properties of calcium copper titanate (CaCu3Ti4O12) ceramics

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Abstract

The Ba2+ doped ceramics of Ca1−xBaxCu3Ti4O12 (x = 0.005, 0.01, 0.03, 0.05 and 0.1) were sintered via conventional solid-state reaction at 1050 °C for 8 h in air. The microstructure and electric properties of Ba2+ doping ceramics were investigated. The lattice parameters of Ca1−xBaxCu3Ti4O12 (CBCTO) ceramics decreased with the Ba2+ doping, and Ba1.31Ti8O16 as secondary phase was confirmed at x = 0.1. The doping of Ba2+ resulted in uniformly distribution of small size grain (~4 μm). All the doped samples showed lower value of dielectric constant than CaCu3Ti4O12 (CCTO), due to low resistivity of the grain boundary with the Ba2+ doped samples. The nonlinear coefficient and breakdown field were significantly enhanced by Ba2+ doping.

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Acknowledgments

This work was supported by the fund of the State Key Laboratory of Advanced Technologies for Comprehensive Utilization of Platinum Metals (No. SKL-SPM-201535, 201548), the Technology Development Project of Yunnan Tin Group (No. Q/GYGL14042010) and Science & Technology Program of Yunnan Province (No. 2014DC019).

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Correspondence to Yiming Zeng.

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Wu, S., Liu, P., Lai, Y. et al. Effect of Ba2+ doping on microstructure and electric properties of calcium copper titanate (CaCu3Ti4O12) ceramics. J Mater Sci: Mater Electron 27, 10336–10341 (2016). https://doi.org/10.1007/s10854-016-5118-9

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  • DOI: https://doi.org/10.1007/s10854-016-5118-9

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