Determination of yttrium and lanthanum in zirconium dioxide by HPLC, X-ray fluorescence and neutron activation analyses |
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Authors: | Y V França F Leitão H M Shihomatsu W S Scapin Jr N M P de Moraes V L Salvador A M G Figueiredo E N S Muccillo R Muccillo |
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Institution: | 1. Instituto de Pesquisas Energéticas e Nucleares, Comiss?o Nacional de Energia Nuclear, C. P. 11049-Pinheiros, 05422-970, S?o Paulo, S. P., Brazil
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Abstract: | Summary Lanthania-and yttria-stabilized zirconium oxide ceramics have been examined using High Performance Liquid Chromatography (HPLC),
thermal neutron activation (NA) and X-ray Fluorescence (XRF) analyses and thus determine the stabilizer content. Ceramic powders
with the composition ZrO2:x mol % La2O3 (x=5, 10, 15, 20 and 33) and ZrO2:x mol % Y2O3 (x=10, 15, 20 and 25) were prepared by the citrate and the co-precipitation techniques, respectively. The lanthanum content
was determined by HPLC (x=5.09, 9.78, 14.98, 19.81 and 25.94) and NA (x=5.15, 10.32, 17.25, 21.08 and 27.97) analyses, the yttrium content by HPLC (x=8.5, 13.5, 17.9 and 22.1) and XRF (x=9.9, 15.8, 20.1 and 24.9) analyses. An experimental sequence, based on continuous dilution of ceramic powder solutions, is
proposed for preparing samples for HPLC measurements. A swimming pool nuclear reactor is used for NA analysis. The quantitative
determinations of yttrium and lanthanum doping levels obtained using those techniques are described. |
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Keywords: | Column liquid chromatography Zirconium oxide ceramics X-ray fluorescence Neutron activation |
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