Thomas, P and Dwarakanath, K and Varma, KBR and Kutty, TRN (2009) Synthesis of nanoparticles of the giant dielectric material, CaCu3Ti4O12 from a precursor route. In: Journal Of Thermal Analysis And Calorimetry, 95 (1). pp. 267-272.
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A complex oxalate precursor, CaCu3(TiO)(4)(C2O4)(8)center dot 9H(2)O, (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 a parts per thousand yen680A degrees 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 25A degrees C, accompanied by low dielectric losses.
|Item Type:||Journal Article|
|Additional Information:||copyright of this article Belongs to Springer.|
|Department/Centre:||Division of Chemical Sciences > Materials Research Centre|
|Date Deposited:||03 Jan 2010 09:50|
|Last Modified:||19 Sep 2010 05:30|
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