Abstract
A brief review of the electric properties of stabilized zirconia indicates that it is an interesting candidate as a basic material for a renewable oxygen getter. Experimental results have confirmed this statement. The material can be electrically reduced simply by passing a dc current through it. Black zirconia thus obtained has an affinity for oxygen close to that of titanium and a high oxygen chemical diffusion coefficient. Under moderate current densities the electrical reduction can be performed in a monophasic region. Thus the material simply reoxidizes by dissolving oxygen, no other compound is formed and the process can be cycled without breaking the sample. Such a getter also presents the advantage of having an electric resistance which sharply varies near saturation. This can provide an easy test for controlling the efficiency of the getter. It was also shown that the electrochemical pump and gauge can be coupled in a very convenient gas circuit to test an oxygen getter.
Published Version
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