Kaur, Shobhneek and Kumar, Ashok and Sharma, Amit L. and Singh, Dwijendra P. (2019) Dielectric and energy storage behavior of CaCu3Ti4O12 nanoparticles for capacitor application. Ceramics International, 45 (6). pp. 7743-7747. ISSN 0272-8842

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Abstract

Nanoparticles of CaCu3Ti4O12 (CCTO) has been synthesized by using sol- gel method. The X-ray diffraction (XRD) and high resolution transmission electron microscopy (HRTEM) have respectively been used to confirm phase purity and determination of CCTO nanoparticles. The size of most of CCTO particles is lying in the range 50-60 nm. The dielectric constant and tangent loss of CCTO at 1 kHz has been found to be similar to 7790 and similar to 0.096 respectively. The breakdown electric field and nonlinear coefficient are found as similar to 4400 V/cm and similar to 6.3 respectively. High value of breakdown electric field and dielectric constant are respectively attributed to: (i) formation of large number of energy bands in grain boundary that traps the electrons at grain/grain boundary interface and, (ii) grain boundary inter barrier layer capacitance (IBLC). High dielectric constant and high breakdown electric field materials are very good for the pulsed power application. Discharge energy density and discharging time are obtained as similar to 7 J/cc and similar to 0.34 ms respectively. Therefore, CCTO exhibits high dielectric constant and high breakdown electric field along with very good capacitive behavior.

Item Type:	Article
Additional Information:	Copyright for this article belongs to M/s Elsevier.
Subjects:	Materials Science
Divisions:	UNSPECIFIED
Depositing User:	Mr. Yogesh Joshi
Date Deposited:	06 Feb 2020 10:18
Last Modified:	06 Feb 2020 10:18
URI:	http://npl.csircentral.net/id/eprint/4148

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