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Journal of Sol-Gel Science and Technology
Published 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

Authors: Mao-Hua Wang, Bo Zhang, Fu Zhou

Published in: Journal of Sol-Gel Science and Technology | Issue 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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Metadata
Title
Preparation and characterization of CaCu3Ti4O12 powders by non-hydrolytic sol–gel method
Authors
Mao-Hua Wang
Bo Zhang
Fu Zhou
Publication date
01-04-2014
Publisher
Springer US
Published in
Journal of Sol-Gel Science and Technology / Issue 1/2014
Print ISSN: 0928-0707
Electronic ISSN: 1573-4846
DOI
https://doi.org/10.1007/s10971-014-3274-z

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