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Wide Ranged La Modification in CCTO Ceramics Through Sol-Gel: Effect on Microstructure and Dielectric Properties

Banerjee, Nirupam and Parui, Jayanta and Krupanidhi, SB (2010) Wide Ranged La Modification in CCTO Ceramics Through Sol-Gel: Effect on Microstructure and Dielectric Properties. In: International Conference on Electroceramics (ICE-2009), DEC 13-17, 2009 , Delhi, INDIA,, pp. 86-98.

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Abstract

Sol-Gel method was employed to synthesize pure and wide ranged La-modified CaCu3Ti4O12 ceramics using mixed acetate-nitrate-alcoxide individual metal-ion precursors. SEM pictures revealed that grain size monotonously decreases with the extent of La incorporation. All the prepared ceramics manifested dielectric constant in the range similar to 10(3)-10(4). Dielectric loss was found to decrease with La incorporation and got optimized for 20% La3+ while retaining its high dielectric constant which may be industrially important. Room temperature Impedance spectroscopy suggested that decrease in grain resistance is responsible for reduction in dielectric loss according to Internal Barrier Layer Capacitor (IBLC) model.

Item Type: Conference Paper
Additional Information: Copyright of this article belongs to Taylor and Francis Group.
Department/Centre: Division of Chemical Sciences > Materials Research Centre
Date Deposited: 21 Dec 2010 11:08
Last Modified: 21 Dec 2010 11:08
URI: http://eprints.iisc.ernet.in/id/eprint/34574

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