Effect of NaNbO3 addition on structure, dielectric and energy storage properties of lead free piezoelectric Bi0.5Na0.5TiO3-K0.5Na0.5NbO3 ceramics

Chandrasekhar, M and Jayarao, G and Khatua, Dipak Kumar and Kumar, P (2019) Effect of NaNbO3 addition on structure, dielectric and energy storage properties of lead free piezoelectric Bi0.5Na0.5TiO3-K0.5Na0.5NbO3 ceramics. In: CERAMICS INTERNATIONAL, 45 (2, A). pp. 1969-1976.

PDF Cer_Int_45-2_1969_2019.pdf - Published Version Restricted to Registered users only Download (5MB) | Request a copy

Abstract

NaNbO3 modified Bi0.5Na0.5TiO3-K0.5Na0.5NbO3 ceramics are prepared as per the nominal formula (1-x) 0.93Bi(0.5)Na(0.5)TiO(3)-0.07K(0.5)Na(0.5)NbO(3)]-xNaNbO(3) (1-x)(0.93BNT-0.07KNN)-xNN; 0 <= x <= 0.16] using conventional solid state synthesis route. Detailed analysis of the compositions indicate decrease in the polarization, increase in the energy storage property and flattening in the temperature dependent dielectric permittivity with increasing NaNbO3 (NN) concentration. Structural study confirms the increasing tendency of cubic like phase formation with increasing NN concentration. Our results suggest that among other factors, cubic like phase formation at room temperature is the responsible factor for the observed trends in various properties. Flattening in the temperature dependent dielectric permittivity indicates that the prepared ceramics are suitable for capacitor applications.

Item Type:	Journal Article
Publication:	CERAMICS INTERNATIONAL
Publisher:	ELSEVIER SCI LTD
Additional Information:	Copyright of this article belongs to ELSEVIER SCI LTD
Keywords:	Energy storage density; Morphotropic phase boundary; Lead free relaxor; Polar nano regions
Department/Centre:	Division of Mechanical Sciences > Materials Engineering (formerly Metallurgy)
Date Deposited:	25 Jan 2019 12:38
Last Modified:	30 Jan 2019 05:57
URI:	http://eprints.iisc.ac.in/id/eprint/61427

Actions (login required)

View Item