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Erschienen in: Journal of Sol-Gel Science and Technology 1/2014

01.04.2014 | Original Paper

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

verfasst von: Mao-Hua Wang, Bo Zhang, Fu Zhou

Erschienen in: Journal of Sol-Gel Science and Technology | Ausgabe 1/2014

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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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Metadaten
Titel
Preparation and characterization of CaCu3Ti4O12 powders by non-hydrolytic sol–gel method
verfasst von
Mao-Hua Wang
Bo Zhang
Fu Zhou
Publikationsdatum
01.04.2014
Verlag
Springer US
Erschienen in
Journal of Sol-Gel Science and Technology / Ausgabe 1/2014
Print ISSN: 0928-0707
Elektronische ISSN: 1573-4846
DOI
https://doi.org/10.1007/s10971-014-3274-z

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