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Preparation and characterization of CaCu3Ti4O12 powders by non-hydrolytic sol–gel method

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Abstract

CaCu3Ti4O12 (CCTO) powders were prepared via a non-hydrolytic sol–gel (NHSG) method by using acetylacetone as chelating agent and ethylene glycol as solvent. The samples were characterized by TG–DSC, Fourier transform infrared spectroscopy, X-ray diffraction and scanning electron microscope. The dielectric properties of ceramics were also measured. The pure perovskite-like CCTO powders were obtained by heat treatment at 800 °C for 2 h. The average particle sizes of CCTO powders calcined at 800 °C were approximately 350–450 nm. The samples sintered at 1,000 °C showed the mean grain size of 2.5–4 μm. Specially, the ceramics exhibited high dielectric constant (1.19 × 105–1.40 × 105) and low dielectric loss (0.051–0.1) in the temperature range of 30–110 °C. Moreover, with the NHSG method the period of synthesis process was greatly shortened.

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Acknowledgments

This work is financially supported by Chang Zhou Science and technology innovation project (CC20120031). We thank Testing Center of Chang Zhou University for providing facility.

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Authors and Affiliations

  1. School of Chemistry and Chemical Engineering, Changzhou University, Changzhou, 213164, People’s Republic of China

    Mao-Hua Wang, Bo Zhang & Fu Zhou

  2. Jiangsu Province Key Laboratory of Fine Petrochemical Industry, Changzhou, 213164, People’s Republic of China

    Mao-Hua Wang

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  1. Mao-Hua Wang
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  2. Bo Zhang
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Correspondence to Bo Zhang.

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Wang, MH., Zhang, B. & Zhou, F. Preparation and characterization of CaCu3Ti4O12 powders by non-hydrolytic sol–gel method. J Sol-Gel Sci Technol 70, 62–66 (2014). https://doi.org/10.1007/s10971-014-3274-z

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  • DOI: https://doi.org/10.1007/s10971-014-3274-z

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