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The effect of oxygen‐to‐metal (O/M) ratio on the sintering behavior of plutonium oxide pellets was evaluated from shrinkage measurements in isochronal heating from 973 K to 1923 K and isothermal heating at 1573 K and 1923 K. Air and Ar/H2 gas for which its P/P ratio was controlled using added moisture (H2/H2O) were used as measurement atmospheres. During isochronal heating, shrinkage began...
Oxygen chemical diffusion in PuO2‐x was investigated in the temperature range of 1473‐1873 K by thermogravimetry as functions of oxygen‐to‐metal (O/M) ratios and temperatures. The oxygen chemical diffusion coefficients, were determined assuming that the reduction curves were dominated by a diffusion process. The O/M ratio and Pu content dependence on the chemical diffusion coefficients...
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