Journal
CERAMICS INTERNATIONAL
Volume 41, Issue 2, Pages 2015-2021Publisher
ELSEVIER SCI LTD
DOI: 10.1016/j.ceramint.2014.09.114
Keywords
Gadolinium zirconate pyrochlore; Hot pressing; Matrix; Pyrochlores
Categories
Funding
- National Centre for Research and Development under strategic research project entitled Technologies Supporting Development of Safe Nuclear Power Engineering [SP/J/4/143 321/11]
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The results of studies on preparation of gadolinium zirconate pyrochlore ceramics are presented. Gd2Zr2O7 powders were prepared by repeated annealing and milling runs of commercial ZrO2 and Gd2O3 micro- and nanopowders and hot-pressed at 1450 degrees C. Scanning Electron Microscopy (SEM) analysis of the microstructure shows average grain size to vary from 1.0 to 5.9 mu m depending on a type of used mixtures. Sintered ceramics were characterized by X-ray diffraction. The highest intensity of the pyrochlore superstructure peaks was found for ceramics obtained from the mixture of nanopowders. The ratio of intensity of the strongest pyrochlore line to the intensity of the strongest peak characteristic for both structures (fluorite and pyrochlore) equals to 4.5% indicating about 80% pyrochlore ordering. (C) 2014 Elsevier Ltd and Techna Group S.r.l. All rights reserved.
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