Optical, structural and thermal properties of hybrid PVA/CaAl2ZrO6 nanocomposite films

Gayitri, Hebbur Maheshwarappa and Al-Gunaid, Murad and Siddaramaiah and Prakash, Akkanagowda Patel Gnana (2020) Optical, structural and thermal properties of hybrid PVA/CaAl2ZrO6 nanocomposite films. Indian Journal of Engineering & Materials Sciences, 27 (2). pp. 320-332. ISSN 0975-1017

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Abstract

This report focuses on fabrication, characterization, and fundamental optical, structural and thermal properties of PVA/calcium aluminum doped zirconate (CaAl2ZrO6) nanocomposites (NCs) films. The PVA-NCs with different amounts viz., 2, 4, 6 and 8 wt% of calcium aluminum zirconate (CaAl2ZrO6) have been fabricated using solvent casting technique. The NC films structural and morphology have been investigated by X-ray diffraction, FTIR and scanning electron microscopy. TEM result indicates that the size of nanoparticles (NPs) lies in the range 10-23nm.. Thermal studies have been evaluated by differential scanning calorimetry (DSC). The optical properties of NCs has been investigated by UV-vis spectroscopy, where the optical study reveals an increased refractive index from 1.22 to 2.23 at a wave length of 300 nm, where as the band gap energy (E-g) is reduced from 5.01 to 3.32 eV for PVA to PVA/8wt% CaAl2ZrO6, respectively. The dielectric studies, optical conductivity measurements and Urbach energy analysis also supports the dopant dependent optical property, tuning of PVA/CaAl2ZrO6 NC films to enable effective material property engineering to suit specified application requirements.

Item Type: Article
Uncontrolled Keywords: CaAl2ZrO6; Refractive index; Tauc's plot; Optical conductivity; T-g
Subjects: D Physical Science > Physics
Divisions: Department of > Physics
Depositing User: Mr Umendra uom
Date Deposited: 16 Feb 2021 09:32
Last Modified: 16 Feb 2021 09:32
URI: http://eprints.uni-mysore.ac.in/id/eprint/15601

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