Preparation by the double extraction process with preliminary neutron irradiation of yttria or calcia stabilised cubic zirconium dioxide microspheres
| Autor: | Rafal Walczak, Stanislaw Kilim, Tomasz Smolinski, D. Wawszczak, E. Strugalska-Gola, Tadeusz Olczak, M. Szuta, Marcin Brykala, Marcin Rogowski |
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| Rok vydání: | 2021 |
| Předmět: |
Materials science
020209 energy chemistry.chemical_element 02 engineering and technology 030218 nuclear medicine & medical imaging law.invention 03 medical and health sciences chemistry.chemical_compound 0302 clinical medicine Fast-neutron reactor law Calcia stabilised zirconia 0202 electrical engineering electronic engineering information engineering Cubic zirconia Yttria-stabilized zirconia Neutron irradiation Inert Sol-gel Double extraction process Yttria stabilised zirconia Zirconium dioxide Extraction (chemistry) Yttrium lcsh:TK9001-9401 Microspheres Spent nuclear fuel Nuclear Energy and Engineering chemistry Chemical engineering lcsh:Nuclear engineering. Atomic power |
| Zdroj: | Nuclear Engineering and Technology, Vol 53, Iss 1, Pp 188-198 (2021) |
| ISSN: | 1738-5733 |
| DOI: | 10.1016/j.net.2020.06.032 |
| Popis: | A modern approach to nuclear energy involves reprocessing like transmutations of spent nuclear fuel products to reduce their radiotoxicity and time needed for their storage. For this purpose, they are immobilized in inert matrices made of zirconia and can be "burned" in fast neutron reactor or Accelerator Driven System. These matrices in spherical form can be obtained by sol-gel process. The paper presents a method of microspheres fabrication based on the combined Complex Sol-Gel Process and double extraction process consisting in the preparation of zirconium-ascorbate sol and simultaneous extraction of water and nitrates. The procedure allows obtaining gel microspheres with a diameter of 50 μm, which after heat treatment are processed into the final product. The synthesis of zirconia microspheres with Yttrium by internal gelation process is well known for over a decade now. However, the explanation and characterization of synthesis of such material by extraction of water process is rarely found. Parameters such as: pH, viscosity, shape, sphericity and crystal structure have been determined for synthesized products and semi-products. In addition, preliminary research consisting in irradiation of the obtained materials in fast and thermal neutron flux was carried out. The obtained results are presented and described in this work. |
| Databáze: | OpenAIRE |
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