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Comparative Study of Synroc-C Ceramics Produced by Hot-Pressingand Inductive Melting

Published online by Cambridge University Press:  03 September 2012

I. A. Sobolev,
S. V. Stefanovsky,
B. I. Omelianenko,
S. V. Ioudintsev,
E. R. Vance and
A. Jostsons
I. A. Sobolev
Affiliation:
SIA “Radon”, 7th Rostovskii per., 2/14, Moscow 119121, Russia
S. V. Stefanovsky
Affiliation:
SIA “Radon”, 7th Rostovskii per., 2/14, Moscow 119121, Russia
B. I. Omelianenko
Affiliation:
Institute of Geology of Ore Deposits, Staromonetnii per., 35, Moscow 109017 Russia
S. V. Ioudintsev
Affiliation:
Institute of Geology of Ore Deposits, Staromonetnii per., 35, Moscow 109017 Russia
E. R. Vance
Affiliation:
ANSTO, New Illawarra Rd, Lucas Heights NSW 2234 PMB 1 Menai, NSW, Australia
A. Jostsons
Affiliation:
ANSTO, New Illawarra Rd, Lucas Heights NSW 2234 PMB 1 Menai, NSW, Australia
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Abstract

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 atRadon, Russia. One of the melted samples was prepared using the Australiansol-gel precursor and the second one was obtained from an oxide-nitratemixture. It was established that the specimens have closely similar mineralcompositions, with major hollandite, perovskite, zirconolite, and rutile.Small amounts of hibonite were also found. Unlike the hot-pressed Synroccontaining metallic alloy particles, melted Synrocs contain molybdates. Aninvestigation of mineral compositions and elemental distribution in thesamples was carried out. Features of hot-pressed and melted ceramics werecompared. Unit cell parameters of the Synroc phases were determined andpreliminary results on durability of the melted Synroc are presented.

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References

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