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A new material in the nuclear technology: gadolinium zirconate pyrochlore prepared by reactive sintering |
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| Authors: | Urszula Brykała Henryk Tomaszewski Ryszard Diduszko Helena Węglarz Agata Sidorowicz Anna Wajler Katarzyna Jach Jacek Jagielski |
| Affiliation: | 1. Institute of Electronic Materials Technology, Wólczyńska 133, 01-919, Warsaw, Poland 2. Tele and Radio Research Institute, Ratuszowa 11, 03-450, Warsaw, Poland 3. Faculty of Materials Engineering, Warsaw University of Technology, Wo?oska 141, 02-507, Warsaw, Poland 4. National Centre for Nuclear Research, A. So?tana, 05-400, Otwock/?wierk, Poland |
| Abstract: | The ability of gadolinium zirconate pyrochlore for actinides incorporation in its lattice makes this material a possible matrix for the immobilization of nuclear wastes. The aim of the presented work was to develop a novel method of gadolinium zirconate synthesis by using a reactive sintering procedure under high pressure based on commercial ZrO2 and Gd2O3 nanopowders. Samples were analyzed using X-ray diffraction and SEM to check their phase composition and microstructure. The obtained sintered pellets demonstrated peaks characteristic for pyrochlore structure for a wide range of preparation temperatures and high density (99.5 % of the theoretical value). It was found that the resulting materials exhibited a homogeneous microstructure and the average grain size dependent on sintering temperature. |
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