Nuclear Engineering and Technology

Korean Nuclear Society (한국원자력학회)
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SrAl2Si2O8 ceramic matrices for 90Sr immobilization obtained via spark plasma sintering-reactive synthesis

  • Papynov, E.K. (Institute of Chemistry, Far Eastern Branch of Russian Academy of Sciences) ;
  • Belov, A.A. (Institute of Chemistry, Far Eastern Branch of Russian Academy of Sciences) ;
  • Shichalin, O.O. (Institute of Chemistry, Far Eastern Branch of Russian Academy of Sciences) ;
  • Buravlev, I. Yu (Institute of Chemistry, Far Eastern Branch of Russian Academy of Sciences) ;
  • Azon, S.A. (Far Eastern Federal University) ;
  • Golub, A.V. (Institute of Chemistry, Far Eastern Branch of Russian Academy of Sciences) ;
  • Gerasimenko, A.V. (Institute of Chemistry, Far Eastern Branch of Russian Academy of Sciences) ;
  • Parotkina, Yu. А. (Institute of Chemistry, Far Eastern Branch of Russian Academy of Sciences) ;
  • Zavjalov, A.P. (Institute of Solid State Chemistry and Mechanochemistry of the Siberian Branch of the Russian Academy of Sciences) ;
  • Tananaev, I.G. (Far Eastern Federal University) ;
  • Sergienko, V.I. (Institute of Chemistry, Far Eastern Branch of Russian Academy of Sciences)
  • Received : 2020.10.14
  • Accepted : 2021.01.27
  • Published : 2021.07.25
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Abstract

In the present study, an original spark plasma sintering-reactive synthesis (SPS-RS) method for minerallike ceramic materials based on SrAl2Si2O8 feldspar-like skeleton structure was used for the first time, promising solid-state matrices for reliable immobilization of high-energy 90Sr. The method is based on the "in-situ" reaction of a mixture of SrO, Al2O3 and SiO2 oxides when heated by a unipolar pulsed current under compacting pressure. The phase and elemental composition structure were studied. The dynamics of the consolidation of the reaction mixture of oxides was studied in the range of 900-1200 ℃. The study found the temperature of the high-speed (minutes) SPS-RS formation of single-phase SrAl2Si2O8 composition ceramic in the absence of intermediate reaction products with a relative density of up to 99.2% and compressive strength up to 145 MPa and a strontium leaching rate of 10-4g/cm2·day.

Keywords

Acknowledgement

The reported study was funded by RFBR, project number 19-33-90078. Mechanical strength characteristics were investigated as a part within State Assignment of the Ministry of Science and Higher Education of the Russian Federation topic No. 00657-2020-0006.

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