Please use this identifier to cite or link to this item: http://nopr.niscair.res.in/handle/123456789/30118
Title: Structure, surface morphology and optical properties of BaTiO3 powders prepared by wet chemical method
Authors: Sengodan, R
Shekar, B Chandar
Sathish, S
Keywords: Ferroelectric materials;Wet chemical method;X-ray diffraction;Optical properties
Issue Date: Dec-2014
Publisher: NISCAIR-CSIR, India
Abstract: Barium titanate powders were synthesized by the wet chemical method using the starting materials barium chloride (BaCl2), titanium dioxide (TiO2) and oxalic acid with different calcinations temperature. The XRD pattern of BaTiO3 calcined at 500 ˚C showed cubic phase whereas BaTiO3 samples calcined at 700 ˚C and above showed tetragonal phase. The crystallite size, strain and dislocation density were calculated from the XRD spectrum. It was found that crystallite size increases with increase of calcination temperature. EDS spectrum was used to identify the composition of the material. Absorption co-efficient (α), extinction co-efficient (K) and optical band gap were estimated from the optical reflectance spectrum. The band gap of the powder was found to be decreasing with the increase of calcination temperature. Nanoparticles of both spherical and rod like in shape were clearly observed in the SEM.
Page(s): 839-845
URI: http://hdl.handle.net/123456789/30118
ISSN: 0975-1041 (Online); 0019-5596 (Print)
Appears in Collections:IJPAP Vol.52(12) [December 2014]

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