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Please use this identifier to cite or link to this item: http://purl.org/purl/4374

Title: On structural, optical and dielectric properties of zinc aluminate nanoparticles
Authors: Anantharaman, M R
Muhammad, Abdul Jamal E
Sakthi Kumar, D
Keywords: Nanoparticles
dielectric permittivity
interfacial polarization
activation energy
Issue Date: 22-Dec-2008
Publisher: Springer
Abstract: Zinc aluminate nanoparticles with average particle size of 40 nm were synthesized using a sol–gel combustion method. X-ray diffractometry result was analysed by Rietveld refinement method to establish the phase purity of the material. Different stages of phase formation of the material during the synthesis were investigated using differential scanning calorimetry and differential thermogravimetric analysis. Particle size was determined with transmission electron microscopy and the optical bandgap of the nanoparticles was determined by absorption spectroscopy in the ultraviolet-visible range. Dielectric permittivity and a.c. conductivity of the material were measured for frequencies from 100 kHz to 8 MHz in the temperature range of 30–120◦C. The presence of Maxwell– Wagner type interfacial polarization was found to exist in the material and hopping of electron by means of quantum mechanical tunneling is attributed as the reason for the observed a.c. conductivity
Description: Bull. Mater. Sci., Vol. 34, No. 2, April 2011, pp. 251–259
URI: http://dyuthi.cusat.ac.in/purl/4374
Appears in Collections:Dr. M R Anantharaman

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