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Dielectric properties of Ba1-xSrxZrO3 (0 ≤ x ≤ 1) nanoceramics developed by citrate precursor route

Published online by Cambridge University Press:  03 April 2013

Omar A. Al-Hartomy ,
Mohd Ubaidullah ,
Dinesh Kumar ,
Jamal H. Madani  and
Tokeer Ahmad
Omar A. Al-Hartomy*
Affiliation:
Department of Physics, Faculty of Science, University of Tabuk, Tabuk 71491, Saudi Arabia; and Department of Physics, Faculty of Science, King Abdulaziz University, Jeddah 21589, Saudi Arabia
Mohd Ubaidullah
Affiliation:
Department of Chemistry, Nanochemistry Laboratory, Jamia Millia Islamia, New Delhi 110025, India
Dinesh Kumar
Affiliation:
Department of Chemistry, Banasthali University, Tonk, Rajasthan 304022, India
Jamal H. Madani
Affiliation:
Department of Physics, Faculty of Science, University of Tabuk, Tabuk 71491, Saudi Arabia
Tokeer Ahmad*
Affiliation:
Department of Chemistry, Nanochemistry Laboratory, Jamia Millia Islamia, New Delhi 110025, India
*
b)e-mail: oalhartomy@hotmail.com
a)Address all correspondence to these authors. e-mail: tahmad3@jmi.ac.in
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Abstract

Nanosized oxides of barium strontium zirconate of general formula Ba1-xSrxZrO3 (0 ≤ x ≤ 1) have been prepared over the entire range of x for the first time by polymeric precursor route using citric acid and ethylene glycol. These solid solutions were investigated by means of powder x-ray diffraction, transmission electron microscopy, scanning electron microscope and Brunauer, Emmett and Teller surface area studies. X-ray diffraction studies reveal the monophasic nature of the powders at 1000 °C. The grain size was found to be in the range of 17–52 nm for all the oxides at 1000 °C. Specific surface area of these solid solutions comes out to be in the range of 49.1–94.4 m2/g. Smallest particle size with highest surface area has been achieved for x = 0.25 and comes out to be 17 nm and 94.4 m2/g respectively. Dielectric constant (ε) and dissipation factor (D) were investigated as a function of frequency and temperature. The room temperature dielectric constant of Ba1-xSrxZrO3 was found to be maximum 105 for x = 0.20 at 1 MHz.

Keywords

nanoscaleceramicstransmission electron microscopyx-ray diffractiondielectric properties
Type
Articles
Information
Journal of Materials Research , Volume 28 , Issue 8 , 28 April 2013 , pp. 1070 - 1077
Copyright
Copyright © Materials Research Society 2013

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