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Title: Optical, structural and thermal properties of hybrid PVA/CaAl2ZrO6 nanocomposite films
Authors: Gayitri, Hebbur Maheshwarappa
Al-Gunaid, Murad
Prakash, Akkanagowda Patel Gnana
Keywords: CaAl2ZrO6, Refractive index;Tauc’s plot;Optical conductivity;Tg
Issue Date: Apr-2020
Publisher: NISCAIR-CSIR, India
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 (Eg) 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.
Page(s): 320-332
ISSN: 0975-1017 (Online); 0971-4588 (Print)
Appears in Collections:IJEMS Vol.27(2) [April 2020]

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