Phase formation at synthesis of murataite-crichtonite ceramics
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Abstract
Abstract Phase formation at synthesis of potential waste form for actinide immobilization was studied. Oxide mixture with composition (wt.%): 55 TiO2, 10 MnO, 10 CaO, 5 Al2O3, 5 Fe2O3, 5 ZrO2, and 10 Gd2О3 (trivalent actinide and neutron poison surrogate) was compacted under 200 MPa at room temperature and sintered for 1–6 h at temperatures from 1200 to 1350 °C. As follows from X-ray diffraction and electron microscopy studies, the ceramics obtained is composed of two structural varieties of murataite and crichtonite-type titanate. The results were compared to ceramic waste forms produced by melting and crystallization.
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Research context
OpenAlex topics: Nuclear materials and radiation effects · Nuclear Materials and Properties · Radioactive element chemistry and processing
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