Solid-state electrochemical sensor for monitoring Mg in Al refining process

Kale, Girish M. ; Jacob, K. T. ; Wang, Ling ; Hong, Yanruo (2006) Solid-state electrochemical sensor for monitoring Mg in Al refining process Journal of the Electrochemical Society, 1 (13). pp. 1-11. ISSN 0013-4651

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Official URL: http://ecst.ecsdl.org/content/1/13/1.short

Related URL: http://dx.doi.org/10.1149/1.2214592

Abstract

Novel solid-state electrochemical sensors have been designed using the Mg2+ cation conductors incorporating novel solid- state reference electrodes for in-line monitoring of Mg in molten Al during the refining process and also for in-line monitoring of Mg content in molten Al in the alloying process. In this paper we report the preparation of Mg2+ ion conductors, MgAl2O4 and MgZr4(PO4)6, by the solid state ceramic synthesis route, measurement of their electrical properties using ac-impedance spectroscopy and application of the above cation conductors for designing novel electrochemical sensors for monitoring Mg dissolved in molten Al. The activation energy for Mg2+ ion conduction in MgAl2O4 is 2.08 eV and in MgZr4(PO4)6 is 1.7 eV, respectively. The sensors have been found to respond rapidly to change in Mg content in molten aluminium around 1000 K.

Item Type:Article
Source:Copyright of this article belongs to The Electrochemical Society.
ID Code:95041
Deposited On:16 Oct 2012 07:06
Last Modified:19 May 2016 07:45

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