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Please use this identifier to cite or link to this item: http://repository.iitr.ac.in/handle/123456789/14426
Title: Structural, dielectric and optical properties of sol–gel synthesized 0.55Ba(Zr0.2Ti0.8)O3–0.45(Ba0.7Ca0.3)TiO3 ceramic
Authors: Rani J.
Yadav, Kamlesh Kumar
Prakash S.
Published in: Applied Physics A: Materials Science and Processing
Abstract: Lead-free polycrystalline ceramic 0.55Ba(Zr0.2Ti0.8)O3–0.45(Ba0.7Ca0.3)TiO3 (0.55BZT–0.45BCT) was synthesized by sol–gel method and the dielectric, impedance and optical properties of this ceramic were studied. X-ray diffraction analysis revealed the formation of pure perovskite phase with the coexistence of tetragonal and rhombohedral structures. The high value of dielectric constant (~6,985) with low dielectric loss (~0.013) was obtained at room temperature. Bulk and grain boundary resistances were measured by impedance analysis, which revealed negative temperature coefficient of resistance behaviour in this ceramic. The estimated value of optical band gap was found to be ~3.16 eV, which is related to the presence of intermediate energy levels. Two emission bands one at ~365 nm (UV region) and another at ~465 nm (blue region) were observed in photoluminescence spectrum at room temperature. © 2014, Springer-Verlag Berlin Heidelberg.
Citation: Applied Physics A: Materials Science and Processing (2014), 117(3): 1131-1137
URI: https://doi.org/10.1007/s00339-014-8482-4
http://repository.iitr.ac.in/handle/123456789/14426
Issue Date: 2014
Publisher: Springer Verlag
ISSN: 9478396
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: Rani, J.; Smart Materials Research Laboratory, Department of Physics, Indian Institute of Technology RoorkeeIndia
Appears in Collections:Journal Publications [PH]

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