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Acta Metall Sin  2010, Vol. 46 Issue (3): 277-281    DOI: 10.3724/SP.J.1037.2009.00579
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MEASUREMENT OF THE DIFFUSIVITY OF OXYGEN IN HIGH-TEMPERATURE LIQUID SILVER BY ELECTROCHEMICAL METHOD
GAO Yunming1); SONG Jianxin1); ZHANG Yeqin1); GUO Xingmin2)
1) Key Laboratory for Ferrous Metallurgy and Resources Utilization of Ministry of Education; Wuhan University of Science and Technology; Wuhan 430081 2) Metallurgical and Ecological Engineering School; University of Science and Technology Beijing; Beijing 100083
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GAO Yunming SONG Jianxin ZHANG Yeqin GUO Xingmin. MEASUREMENT OF THE DIFFUSIVITY OF OXYGEN IN HIGH-TEMPERATURE LIQUID SILVER BY ELECTROCHEMICAL METHOD. Acta Metall Sin, 2010, 46(3): 277-281.

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Abstract  

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.

Key words:  liquid silver      oxygen diffusivity      solid electrolyte      electrochemical cell      metallurgy with controlled oxygen flow     
Received:  04 September 2009     
Fund: 

Supported by National High Technology Research and Development Program of China No.2006AA06Z125)

URL: 

https://www.ams.org.cn/EN/10.3724/SP.J.1037.2009.00579     OR     https://www.ams.org.cn/EN/Y2010/V46/I3/277

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