Low temperature synthesis of nano-crystalline CaCu3Ti4O12 through a fuel mediated auto-combustion pathway

Banerjee, Nirupam ; Krupanidhi, S. B. (2010) Low temperature synthesis of nano-crystalline CaCu3Ti4O12 through a fuel mediated auto-combustion pathway Current Nanoscience, 6 (4). pp. 432-438. ISSN 1573-4137

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Official URL: http://www.bentham.org/cnano/contabs/cnano6-4.html...

Related URL: http://dx.doi.org/10.2174/157341310791658955

Abstract

A novel, cost effective, environment-friendly and energetically beneficial alternative method for the synthesis of giant dielectric pseudo-perovskite material CaCu3Ti4O12 (CCTO) is presented. The method involved auto-combustion of an aqueous precursor solution in oxygen atmosphere with the help of external fuels and is capable of producing high amount of CCTO at ultra-low temperature, in the combustion residue itself. The amount of phase generated was observed to be highly dependent on the combustion process i.e. on the nature and amount of external-fuels added for combustion. Two successful fuel combinations capable of producing reasonably higher amount of the desired compound were investigated. On a structural characterization grain size was observed to decrease drastically to nano-dimension compared to submicron-size that was obtained in a traditional sol-gel combustion and subsequent cacination method. Therefore, the method reported can produce nano-crystalline CaCu3Ti4O12 ceramic matrix at an ultra-low temperature and is expected to be applicable for other multifunctional perovskite oxide materials.

Item Type:Article
Source:Copyright of this article belongs to Bentham Science Publishers Ltd.
Keywords:Dielectric Material; Solution Combustion; Nano-crystalline Perovskites
ID Code:19448
Deposited On:22 Nov 2010 12:35
Last Modified:04 Jun 2011 10:01

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