Dash, Smaranika and Mohanty, Hari Sankar and Bhoi, Krishnamayee and Kant, Ravi and Kumar, Ashok and Thomas, Reji and Pradhan, Dillip K. (2018) Sintering dependent Ca2+ solubility in barium titanate synthesized by sol-gel auto combustion method. Journal of Materials Science: Materials in Electronics, 29 (24). pp. 20820-20831. ISSN 0957-4522

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Abstract

We report the preparation of ferroelectric Ba0.7Ca0.3TiO3 (BCT) ceramics by sol-gel auto combustion technique and its specific functional properties. The structural, dielectric and ferroelectric properties of BCT are strongly depending on the sintering temperature which also improves the phase purity and crystalline quality of the system. The formation of single-phase BCT is realized by sintering at 1450 degrees C for 4h. suggesting the solubility limit of Ca2+ cation. Grain size and relative density are increased as the sintering temperature increased. The Rietveld refinement technique is employed for the detailed crystal structural analysis. The temperature and frequency dependent dielectric properties are investigated; the measured dielectric constant is epsilon(r)=2680at the transition temperature T-c=120 degrees C for the single phase ferroelectric BCT. Sintering and electrical poling improved the shape of the hysteresis curve and reduced the leakage current. Electrical conduction mechanism is also discussed.

Item Type:	Article
Additional Information:	Copyright for this article belongs to M/s Springer Verlag.
Subjects:	Engineering > Electronics and Electrical Engineering Materials Science Applied Physics/Condensed Matter
Divisions:	UNSPECIFIED
Depositing User:	Mr. Yogesh Joshi
Date Deposited:	22 Aug 2019 07:50
Last Modified:	22 Aug 2019 07:50
URI:	http://npl.csircentral.net/id/eprint/4000

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