Contact Noise in Sodium Beta Alumina.
Technical rept. Jan-May 87,
UTAH UNIV SALT LAKE CITY DEPT OF PHYSICS
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Contact noise in sodium beta alumina cels has been studies by voltage fluctuation measurements at frequencies 10,000 to 30,000 Hx in in the presence and absence of current. A propylene carbonate solution of NaI forms a low noise contanct with beta alumina ceramic electrolyte. The noise spectra for aqueous solution of NaNO3, silver amalgam and newly prepared mercury electrodes, however, show excess noise at low frequencies and exhibit f-2 spectra that suggests nonequilibrium reactions occur at the interface. The current noise of both the aqueous and propylene carbonate solution electrodes displays f1.5 dependence characteristic of diffusion noise. Keywords Diffusion Noise Conductivity fluctuations Supersonic Conductors Alumina Ceramics Crystals.
- Inorganic Chemistry