Title of article :
Measurement of oxygen potential of at 1773 and 1873 K, and its analysis based on point defect chemistry
Author/Authors :
Kato، نويسنده , , Masato and Nakamichi، نويسنده , , Shinya and Takeuchi، نويسنده , , Kentaro and Sunaoshi، نويسنده , , Takeo، نويسنده ,
Issue Information :
روزنامه با شماره پیاپی سال 2011
Pages :
4
From page :
623
To page :
626
Abstract :
Oxygen potential, G ¯ O 2 , of (U0.8Pu0.2) O2±x was measured at 1773 and 1873 K by a gas equilibrium method using a thermogravimeter. The measurement data were analyzed based on point defect chemistry, and the partial Gibbs energies at stoichiometric composition were determined from the analysis results which were obtained by using the relationship between deviation of stoichiometric composition x and oxygen partial pressure P O 2 , x ∝ P O 2 ± 1 / 2 , in the near stoichiometric region. The G ¯ O 2 was represented as functions of the deviation x and temperature, being the calculation results in good agreement with experimental data. The G ¯ O 2 at stoichiometric composition was described by the equation: G ¯ O 2 ( J / mol ) = − 517.5 × 10 3 + 116.5 ⋅ T .
Keywords :
Oxygen potential , MOX , Stoichiometry , Point defect , Fluorite structure
Journal title :
Calphad
Serial Year :
2011
Journal title :
Calphad
Record number :
1816108
Link To Document :
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