Mixed Conduction of Proton and Electron in Tungsten Phosphate Glass and its Hydrogen Transport

Abstract:

The transference number of protons and the hydrogen transport behavior through tungsten phosphate glass have been measured through the use of a concentration cell. Based on measurement of the electrical motive force by changing the hydrogen partial pressure of both sides of a specimen glass kept in the concentration cell, the ionic transference number was estimated to be 48%. When one side is kept in hydrogen and the other in nitrogen, hydrogen transport is observed and its quantity is accelerated by applying a positive dc bias on the hydrogen side. After applying the dc bias continuously for over 1 h, the hydrogen transport is abruptly increased with no cracks and the hydrogen flux is 1.510-3 molcm-2s-1.

• Periodical: Key Engineering Materials (Volumes 421-422)
• Pages: 443-446
• DOI: https://doi.org/10.4028/www.scientific.net/KEM.421-422.443
• Online since: December 2009
• Authors: Satoru Fujitsu, Hiroshi Kawazoe
• Keywords: Concentration Cell, Hydrogen, Mixed Conductor, Phosphate Glass, Proton

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