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Microwave synthesis and sintering characteristics of $CaCu_3Ti_4O_1_2$

Thomas, P and Sathapathy, LN and Dwarakanath, K and Varma, KBR (2007) Microwave synthesis and sintering characteristics of $CaCu_3Ti_4O_1_2$. In: Bulletin of Material Science, 30 (6). pp. 567-570.

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Abstract

$CaCu_3Ti_4O_1_2$ (CCTO) was synthesized and sintered by microwave processing at 2⋅45 GHz, 1⋅1 kW. The optimum calcination temperature using microwave heating was determined to be 950°C for 20 min to obtain cubic CCTO powders. The microwave processed powders were sintered to 94% density at 1000°C/60 min. The microstructural studies carried out on these ceramics revealed the grain size to be in the range 1–7 μm. The dielectric constants for the microwave sintered (1000°C/60 min) ceramics were found to vary from 11000–7700 in the 100 Hz–100 kHz frequency range. Interestingly the dielectric loss had lower values than those sintered by conventional sintering routes and decreases with increase in frequency

Item Type: Journal Article
Additional Information: Copyright of this article belongs to Indian Academy of Sciences
Keywords: Microwave processing; sintering; giant dielectrics; microstructure
Department/Centre: Division of Chemical Sciences > Materials Research Centre
Date Deposited: 26 Feb 2008
Last Modified: 19 Sep 2010 04:42
URI: http://eprints.iisc.ernet.in/id/eprint/13093

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