Study of Cerium State in the Process of Self-propagating High-temperature Synthesis

In this paper, thermit was used as the heat source of self-propagating reaction. The main components of sand, Al2O3 and SiO2 were selected as the curing materials with adding 5% CeO2 as the simulated nuclide. The reaction process of simulated nuclide at high temperature and the existing form in the solidification were analysed and characterized by TG-DSC and XRD. The results showed that the obtained solidifications were amorphous glass and ceramic phases. In the Al(2)O(3)and CeO2 system, the reaction temperature was 1320 degrees C, and Ce was mainly in the form of CeAl11O18 in the solidification. In the system of SiO2 and CeO2, the reaction temperature was 1280 degrees C, and Ce was mainly in the form of Ce2SiO5 in the solidification.