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Concentration dependent structural behavior of Gd2O3 nanocrystallites dispersed in silica matrix

RACHNA1,* , NIDHI1, INDU YADAV1, D.S. AHLAWAT1, P. AGHAMKAR1

Affiliation

  1. Department of Physics, Materials Science Lab, Ch. Devi Lal University, Sirsa-125055, Haryana, India

Abstract

Nanocrystalites of Gd2O3 have been successfully synthesized by sol-gel process using hydrochloric acid as a catalyst. Gd(NO3)3.6H2O and TEOS were used as precursors and obtained powdered form of Gd2O3:SiO2 powder. The powdered samples having 2.2 and 3.4 mol % Gd2O3 were annealed at 500°C and 900°C temperature for 6h and characterized by X-ray diffraction (XRD), Fourier transforms infrared spectroscopy (FTIR), Scanning electron microscopy (SEM) and Transmission electron microscopy (TEM). The effects of sintering temperature and concentration of gadolinium oxide on the phase evolution of the prepared sample have been discussed in detail. The powdered samples having 2.2 mol % Gd2O3 do not show any crystalline structure probably due to low concentration of gadolinium oxide. The pure cubic phase of gadolinium oxide was completely developed in annealed sample having 3.4 mol % Gd2O3. The average nanocrystallite size was calculated ~ 21 nm using well known Debye-Scherrer’s equation..

Keywords

Gadolinium oxide, Silica, FTIR, SEM and TEM.

Submitted at: Oct. 20, 2014
Accepted at: May 7, 2015

Citation

RACHNA, NIDHI, INDU YADAV, D.S. AHLAWAT, P. AGHAMKAR, Concentration dependent structural behavior of Gd2O3 nanocrystallites dispersed in silica matrix, Journal of Optoelectronics and Advanced Materials Vol. 17, Iss. 5-6, pp. 640-645 (2015)