Phase relationships in systems based on Y,Gd, Mn,Ti, and U oxides with addition of Ca,Al, and Fe oxides |
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| Authors: | S. V. Stefanovskii O. I. Stefanovskaya S. V. Yudintsev B. S. Nikonov |
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| Affiliation: | (1) Joint Ecological, Engineering, and Research Center for Radioactive Waste Management and Environment Protection (Radon Production Association), State Unitary Enterprise, Moscow, Russia;(2) Institute of Geology of Ore Deposits, Petrography, Mineralogy, and Geochemistry, Russian Academy of Sciences, Moscow, Russia |
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| Abstract: | Samples of titanate-based ceramics with Y, Gd, Mn, U, Ca, Al, and Fe oxides, which are of interest as hosts for immobilization of radioactive waste containing lanthanides, actinides, and corrosion products, were prepared by cold pressing, sintering, and fusion. The major components of the ceramics are phases of the structure derived from the fluorite structure (pyrochlore, “murataite,” cubic oxide with fluorite lattice type), and also brannerite. Introduction of Al and Fe oxides (corosion products) leads to the formation of additional phases of the perovskite and/or crichtonite structure. |
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