Journal of Thermal Analysis and Calorimetry
Volume/Issue:
Volume 95: Issue 1
Synthesis of nanoparticles of the giant dielectric material, CaCu3Ti4O12 from a precursor route
Authors:
P. Thomas

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K. Dwarakanath Central Power Research Institute Dielectric Materials Division Bangalore 560 080 India

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,
K. Varma Indian Institute of Science Materials Research Centre Bangalore 560012 India

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T. Kutty Indian Institute of Science Materials Research Centre Bangalore 560012 India

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Pages:
267–272
Online Publication Date:
20 Sep 2008
Publication Date:
01 Jan 2009
Article Category:
Research Article
DOI:
https://doi.org/10.1007/s10973-007-8981-z
Keywords:
CaCu3Ti4O12; FTIR; giant dielectrics; precursor; TG; X-ray
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Abstract  

A complex oxalate precursor, CaCu3(TiO)4(C2O4)8·9H2O, (CCT-OX), was synthesized and the precipitate that obtained was confirmed to be monophasic by the wet chemical analyses, X-ray diffraction, FTIR absorption and TG/DTA analyses. The thermal decomposition of this oxalate precursor led to the formation of phase-pure calcium copper titanate, CaCu3Ti4O12, (CCTO) at ≥680°C. The bright-field TEM micrographs revealed that the size of the as synthesized crystallites to be in the 30–80 nm range. The powders so obtained had excellent sinterability resulting in high density ceramics which exhibited giant dielectric constants upto 40000 (1 kHz) at 25°C, accompanied by low dielectric losses, <0.07.

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Cover Journal of Thermal Analysis and Calorimetry
Journal of Thermal Analysis and Calorimetry
Print ISSN:
1388-6150
Online ISSN:
1572-8943

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Journal of Thermal Analysis and Calorimetry
Language English
Size A4
Year of
Foundation		 1969
Volumes
per Year		 1
Issues
per Year		 24
Founder Akadémiai Kiadó
Founder's
Address		 H-1117 Budapest, Hungary 1516 Budapest, PO Box 245.
Publisher Akadémiai Kiadó
Springer Nature Switzerland AG
Publisher's
Address		 H-1117 Budapest, Hungary 1516 Budapest, PO Box 245.
CH-6330 Cham, Switzerland Gewerbestrasse 11.
Responsible
Publisher		 Chief Executive Officer, Akadémiai Kiadó
ISSN 1388-6150 (Print)
ISSN 1588-2926 (Online)

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