MEASUREMENT OF THE DIFFUSIVITY OF OXYGEN IN HIGH-TEMPERATURE LIQUID SILVER BY ELECTROCHEMICAL METHOD
Received date: 2009-09-04
Online published: 2010-03-11
Supported by
Supported by National High Technology Research and Development Program of China No.2006AA06Z125)
The diffusivity of oxygen in liquid silver in the temperature range of 1473 to 1773 K were determined by potentiostatic methods employing the following zirconia base solid electrolyte cell arrangement of cylindrical geometry: (+)Pt ︳air ︳ZrO2（MgO）︳[O]Ag(l) ︳Ir(-). The diffusivity of oxygen in liquid silver was calculated from the change of the external current with time by applying a preselected voltage on the electrochemical cell. The relation between oxygen diffusivity and temperature was given: Do=（1.11+-0.04)*10^(-3)exp[(-25573+-1718)/RT]cm2s-1 （1473～1773K） The present experimental results were in close agreement with those extrapolated from the predecessors’ data at low temperature. The diffusivity of oxygen in liquid silver at 1773K was found to be (1.96+-0.28)*10^(-4) cm2s-1.
GAO Yun-Meng , SONG Jian-Xin , ZHANG Ye-Qi , GUO Xin-Min . MEASUREMENT OF THE DIFFUSIVITY OF OXYGEN IN HIGH-TEMPERATURE LIQUID SILVER BY ELECTROCHEMICAL METHOD[J]. Acta Metall Sin, 2010 , 46(3) : 277 -281 . DOI: 10.3724/SP.J.1037.2009.00579
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