The Effect Of Pt Alloying Reactions On Electrochemical Measurements In Glass Melts

Since electrochemical measurements are made at the measuring electrode/melt interface, the desired bulk properties of the melt can be measured only when the measuring electrode is inert. For certain glass melts, no metals qualify as measuring electrodes - even Pt reacts strongly with these melts. The fact that Pt reacts with glass melts is hardly news; the interesting new result is that the effects of these reactions on the redox state of the adjacent glass melt can be very large and long lasting. The results of in-glass P02 measurements of several commercial glasses are reported. It was found that in-glass P02 measurements are especially difficult in viscous melts with low oxygen mobility.