Browsing by Author "Stefanovsky, SV"

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    Comparative study of Synroc-c ceramics produced by hot-pressing and inductive melting
    (Materials Research Society, 1997) Sobolev, IA; Stefanovsky, SV; Omelianenko, BI; Ioudintsev, SV; Vance, ER; Jostsons, A
    Three Synroc-C samples, containing simulated high level waste were studied. One was produced by the conventional hot-pressing method at ANSTO, Australia, and the others were obtained using cold crucible technology at Radon, Russia. One of the melted samples was prepared using the Australian sol-gel precursor and the second one was obtained from an oxide-nitrate mixture. It was established that the specimens have closely similar mineral compositions, with major hollandite, perovskite, zirconolite, and rutile. Small amounts of hibonite were also found. Unlike the hot-pressed Synroc containing metallic alloy particles, melted Synrocs contain molybdates. An investigation of mineral compositions and elemental distribution in the samples was carried out. Features of hot-pressed and melted ceramics were compared. Unit cell parameters of the Synroc phases were determined and preliminary results on durability of the melted Synroc are presented. © Materials Research Society 1997