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Synthesis and characterization of nanoparticles of Ba2EuZrO5.5: A new complex perovskite ceramic oxide

Published online by Cambridge University Press:  31 January 2011

R. Jose ,
J. James ,
Asha M. John ,
R. Divakar  and
J. Koshy
R. Jose
Affiliation:
Regional Research Laboratory, Council of Scientific and Industrial Research, Trivandrum, India, 695 019
J. James
Affiliation:
Regional Research Laboratory, Council of Scientific and Industrial Research, Trivandrum, India, 695 019
Asha M. John
Affiliation:
Regional Research Laboratory, Council of Scientific and Industrial Research, Trivandrum, India, 695 019
R. Divakar
Affiliation:
Physical Metallurgy Section, Indira Gandhi Centre for Atomic Research, Kalpakkam, India, 603 102
J. Koshy
Affiliation:
Regional Research Laboratory, Council of Scientific and Industrial Research, Trivandrum, India, 695 019
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Abstract

Nanoparticles of barium europium zirconate, a complex perovskite oxide, were synthesized using a modified self-propagating combustion synthesis. The solid combustion products thus obtained were characterized by x-ray and electron diffraction, differential thermal analysis, thermogravimetric analysis, infrared spectroscopy, particle-size analysis, surface area determination, gas adsorption studies, and high-resolution transmission electron microscopy. According to the results of the x-ray and electron diffraction, as-prepared powder showed the single phase of barium europium zirconate (Ba2EuZrO5.5) without another phase and had a complex cubic perovskite (A2BB′O6) structure. The transmission electron microscopic investigation showed a mean grain size of 38 nm with a standard deviation of 12 nm. High-resolution lattice imaging of the nanoparticles indicated the possibility of finer crystallite in the particle having the same orientation. The nanoparticles of Ba2EuZrO5.5 obtained by the present method could be sintered to 97% theoretical density at a relatively low temperature of 1525 °C.

Type
Articles
Information
Journal of Materials Research , Volume 15 , Issue 10 , October 2000 , pp. 2125 - 2130
Copyright
Copyright © Materials Research Society 2000

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