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Please use this identifier to cite or link to this item: http://repository.iitr.ac.in/handle/123456789/13796
Title: Enhanced dielectric, ferroelectric and optical properties of lead free (K0.17Na0.83)NbO3 ceramic with WO3 addition
Authors: Rani J.
Yadav, Kamlesh Kumar
Prakash S.
Published in: Materials Science and Engineering B: Solid-State Materials for Advanced Technology
Abstract: Polycrystalline lead-free ceramics (K0.17Na0.83) NbO3 + x wt.% WO3; (x = 0, 1, 3 and 5) have been synthesized via solid state reaction method. X-ray diffraction pattern at room temperature indicates the formation of pure perovskite phase with monoclinic structure for all samples. Dielectric constant versus temperature measurements shows an increase in dielectric constant with a shift in Curie temperature (TC) toward higher temperature side. Remnant polarization (P r) is found to be enhanced and reached upto 24 μC/cm2 for x = 5 wt.% WO3 from 12.5 μC/cm2 for pure (K 0.17Na0.83)NbO3 ceramic. The value of coercive field (Ec) decreases with increasing wt.% of WO3. From optical band gap study, we found blue shift in the band gap of (K 0.17Na0.83)NbO3 with increasing concentration of WO3. © 2013 Elsevier B.V. All rights reserved.
Citation: Materials Science and Engineering B: Solid-State Materials for Advanced Technology (2013), 178(20): 1469-1475
URI: https://doi.org/10.1016/j.mseb.2013.09.014
http://repository.iitr.ac.in/handle/123456789/13796
Issue Date: 2013
Keywords: Dielectric properties
Ferroelectricity
Lead-free ceramics
Optical properties
X-ray diffraction
ISSN: 9215107
Author Scopus IDs: 54387571600
7005825645
36830433000
Author Affiliations: Rani, J., Smart Materials Research Laboratory, Department of Physics, Indian Institute of Technology Roorkee, Roorkee 247667, India
Yadav, K.L., Smart Materials Research Laboratory, Department of Physics, Indian Institute of Technology Roorkee, Roorkee 247667, India
Prakash, S., Metallurgical and Materials Engineering Department, Indian Institute of Technology Roorkee, Roorkee 247667, India
Corresponding Author: Yadav, K.L.; Smart Materials Research Laboratory, Department of Physics, Indian Institute of Technology Roorkee, Roorkee 247667, India; email: klyadav35@yahoo.com
Appears in Collections:Journal Publications [PH]

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