Immobilization of Silica Gel Fixed Cesium and Strontium into Mineral-Like Matrices in the SHS Mode
Tóm tắt
Preparation of analogs of minerals pollucite and sphene by metallothermal self-propagating high-temperature synthesis (SHS) was studied with model systems. These analogs are intended for immobilizing silica gel fixed cesium and strontium radionuclides, respectively. The optimal conditions for SHS were found, and the phase compositions of the reaction products were studied. In synthesis of pollucite, the energy-forming components are Al and Fe2O3, and in synthesis of sphene, Ti and MoO3. The mineral analogs synthesized are distinguished by high hardness and chemical stability. Virtually no cesium is lost by evaporation.
Tài liệu tham khảo
Dzekun, E.G., Nardova, A.N., Korchenkin, K.K. and Mashkin, A.N., RF Patent no. 2 111 562, priority of May 29, 1996.
Merzhanov, A.G., Borovinskaya, I.P., Makhonin, N.S., et al., RF Patent no. 2 065 216, 1996, priority of March 18, 1994.
Konovalov, E.K., Starkov, O.V., and Myshkovskii, M.P., Abstracts of Papers, II Obninskii simpozium po radiokhimii (II Obninsk Symp. on Radiochemistry), Obninsk, May 27-31, 1996, pp. 328-329.
Konovalov, E.K., Starkov, O.V., Mashkovskii, M.P., and Gudkov, L.S., Izv. Vyssh. Uchebn. Zaved., Yadern. Energet., 1997, no. 3, pp. 36-39.
Glagovskii, E.M., Kuprin, A.V., Konovalov, E.E., et al., At. Energ., 1999, vol. 87, no. 1, pp. 57-61.
Kalinina, A.M. and Filipovich, V.N., in Silikaty i okisly v khimii vysokikh temperatur (Silicates and Oxides in High-Temperature Chemistry), Moscow, 1963, pp. 81-94.
Brindley, G.W. and Nakahira, M., J. Am. Ceram. Soc., 1959, vol. 42, no. 7, pp. 319-324.
Merzhanov, A.G., Izv. Ross. Akad. Nauk, Ser. Khim., 1997, no. 1, pp. 22-23.