Details

Autor(en) / Beteiligte

• Ganesan, Rajesh
• Gnanasekaran, T.
• Srinivasa, Raman S.

Titel

Electrochemical study on determination of diffusivity, activity and solubility of oxygen in liquid bismuth

Ist Teil von

• The Journal of chemical thermodynamics, 2006-06, Vol.38 (6), p.739-747

Ort / Verlag

Kidlington: Elsevier Ltd

Erscheinungsjahr

2006

Quelle

Alma/SFX Local Collection

Beschreibungen/Notizen

• Diffusivity of oxygen in liquid bismuth was measured by potentiostatic method and is given by lg ( D O Bi / cm 2 · s - 1 ) ( ± 0.042 ) = - 3.706 - 1377 / ( T K - 1 ) ( 804 < T / K < 1090 ) . Activityof oxygen in bismuth was determined by coulometric titrations and using the measured data standard free energy of dissolution of oxygen in liquid bismuth was derived for the reaction: 1 / 2 O 2 ( g ) = [ O ] Bi ( at . % ) and is given by Δ G O ( Bi ) ∘ / ( J · g - atom O - 1 ) ( ± 720 ) = - 108784 + 20.356 T K - 1 ( 753 < T / K < 1020 ) . Using the above data and Gibbs free energy of formation of Bi 2O 3 (s), solubility of oxygen in liquid bismuth was derived as a function of temperature and is given by the following expressions: lg ( S / at % O ) ( ± 0.05 ) = - 4476 / T K - 1 + 4.05 ( 753 < T / K < 988 ) ; lg ( S / at . % O ) ( ± 0.04 ) = - 3786 / T K - 1 + 3.36 ( 988 < T / K < 1020 ) . The present data on solubility of oxygen in liquid bismuth is compared with the literature data.