Abstract
The equilibrium vapor pressures in the D 2 D 2O LiAlO 2 system were measured by means of an atmosphere-controllable high temperature mass spectrometer in the temperature range 1573–1773 K. Based on the reaction, 5LiAlO 2(s) + 2D 2O(g) = 4LiOD(g) + LiAl 5O 8(s), the heat of formation of LiAl 5O 8 was evaluated to be −4553.9 kJ/mol, which is in good agreement with the data in previous studies based on the reaction, 5LiAlO 2(s) = 4Li(g) + O 2(g) + LiAl 5O 8(s). The results of this study enabled estimation of the maximum allowable temperature with respect to lithium transport by the sweep gas in fusion reactor blanket.
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