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Title: Gd2Zr2O7 and Nd2Zr2O7 pyrochlore prepared by aqueous chemical synthesis
Authors: Kong, L
Karatchevtseva, I
Gregg, DJ
Blackford, MG
Holmes, R
Triani, G
Keywords: Pyrochlore
Rare earths
Temperature dependence
Issue Date: 1-Dec-2013
Publisher: Elsevier
Citation: Kong, L., Karatchevtseva, I., Gregg, D. J., Blackford, M. G., Holmes, R., & Triani, G. (2013). Gd2Zr2O7 and Nd2Zr2O7 pyrochlore prepared by aqueous chemical synthesis. Journal of the European Ceramic Society, 33(15-16), 3273-3285. doi:10.1016/j.jeurceramsoc.2013.05.011
Abstract: Pyrochlore structured Gd2Zr2O7 and Nd2Zr2O7 are produced via complex precipitation processing. A suite of characterization techniques, including FTIR, Raman, X-ray and electron diffraction, TEM, SEM as well as nitrogen sorption are employed to investigate the structural and grain size evolution of the synthesized and calcined powder. Results show that Gd2Zr2O7 with the pyrochlore structure are produced after calcination at 1400 °C for 12 h while Nd2Zr2O7 has already formed the pyrochlore structure at 1200 °C. This method allows the formation of dense materials at relatively low temperature, with bulk densities over 92% of the theoretical values achieved after sintering at 1400 °C for 50 h. This unique aqueous synthetic method provides a simple pathway to produce pyrochlore lanthanide zirconate without using either organic solvent and/or mechanical milling procedures, making the synthesis protocol an attractive potential scale-up production of highly refractory ceramics. © 2013, Elsevier Ltd.
Gov't Doc #: 6136
ISSN: 0955-2219
Appears in Collections:Journal Articles

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