Patent ID: 6340418
Filing Date: 2002-01-22
Classification: G01N

Abstract:
An electrochemical sensor for insertion into molten slag for determining an activity of a metal oxide in the slag comprising:a reference electrode comprising a mixture of (i) a metal or a metal alloy and (ii) a metal oxide, the metal or the metal alloy and the metal oxide each being exposed on a surface of the reference electrode; at least one oxide electrode comprising (i) a metal alloy, (ii) a mixture of a metal and a metal oxide or (iii) a mixture of a metal and a metal silicide different from the mixture of the reference electrode, the metal alloy, the metal oxide and the metal silicide of the oxide electrode each being exposed on a surface of the oxide electrode; and a refractory housing holding the reference electrode and the at least one oxide electrode wherein the reference electrode and the at least one oxide electrode extend from within the refractory housing such that the surface of the reference electrode and the surface of the oxide electrode are each in direct contact with the molten slag when the sensor is inserted into the slag.