Accession Number:

ADA156135

Title:

Noise in Silver beta Alumina Ceramics.

Descriptive Note:

Technical rept.,

Corporate Author:

UTAH UNIV SALT LAKE CITY DEPT OF PHYSICS

Personal Author(s):

Report Date:

1985-09-01

Pagination or Media Count:

14.0

Abstract:

Voltage fluctuations at ohmic electrodes to silver beta alumina ceramic samples are observed both at contacts and in the bulk over the frequency interval 0.001 to 10000 Hz. Contact noise power in the absence of current varies as 2F at low frequencies and is dominated by Nyquist noise of the sample at frequencies greater than 100 Hz. Bulk current noise measured at transverse contacts has a f to the minus 32 power spectrum and increases with the square of the current. Low-frequency contact noise, sample Nyquist noise and bulk current noise are all thermally activated with activation energies of -0.96, 0.14, and 0.61 eV, respectively. These experimental results are very similar to those previously reported for sodium beta alumina ceramics. Additional keywords diffusion noise. Author.

Subject Categories:

  • Electrical and Electronic Equipment
  • Ceramics, Refractories and Glass
  • Acoustics

Distribution Statement:

APPROVED FOR PUBLIC RELEASE