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Impedance investigations on heat-stressed, pH-sensitive glass membranes

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Abstract

The behaviour of pH glass sensors is determined strongly by the kind and composition of glasses. For the heat stability, the kind and concentration of the alkaline oxide as modifier play an important role. It could be shown by potentiometric and impedimetric measurements that lithium oxide-containing glass membranes are much more stable than those with sodium oxide concerning the emf of the electrochemical cell. They tolerate several 5-h heat treatments at temperatures of 100°C. The impedance plots show differences in electrochemical kinetics between both glass membranes, which can be caused by different leaching due to differences in ionic radii of Li+ and Na+, respectively.

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Authors and Affiliations

  1. Kurt-Schwabe-Institute for Measuring and Sensor Technology Meinsberg, Kurt-Schwabe-Strasse 4, 04720, Ziegra-Knobelsdorf, Germany

    Winfried Vonau, Frank Berthold & Ulrich Guth

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  1. Winfried Vonau
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  2. Frank Berthold
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  3. Ulrich Guth
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Correspondence to Winfried Vonau.

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Vonau, W., Berthold, F. & Guth, U. Impedance investigations on heat-stressed, pH-sensitive glass membranes. J Solid State Electrochem 15, 95–98 (2011). https://doi.org/10.1007/s10008-010-1148-z

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  • DOI: https://doi.org/10.1007/s10008-010-1148-z

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