Solid state electrochemical sensor for monitoring Mg in Al refining process

Kale, Girish M and Jacob, KT and Wang, Ling and Hong, Yanruo (2006) Solid state electrochemical sensor for monitoring Mg in Al refining process. In: Electrochemical Society Transactions, 1 (13). pp. 1-11.

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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:	Journal Article
Publication:	Electrochemical Society Transactions
Publisher:	The Electrochemical Society
Additional Information:	Copyright of this article belongs to The Electrochemical Society.
Department/Centre:	Division of Mechanical Sciences > Materials Engineering (formerly Metallurgy)
Date Deposited:	29 Dec 2011 05:54
Last Modified:	29 Dec 2011 05:54
URI:	http://eprints.iisc.ac.in/id/eprint/42746

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