Diffusion Noise in Annealed Na, Ag and Pb Beta Aluminas.

Abstract

Conductivity fluctuations in Lead beta' alumina arising from diffusion of the mobile ions are observed to increase linearly with annealing time at a temperature of 130 C after quenching from 550 C. Simultaneously, the conductivity as measured by Nyquist noise decreases linearly. No effect of annealing on conductivity fluctuations or conductivity is found for either sodium beta' alumina or silver beta' alumina. The increase in conductivity fluctuations for Pb beta' alumina can be interpreted in terms of a decrease in effective ion density for diffusion noise. Keywords: superionic conductors, beta alumina ceramics, electrical conductivity noise (electrical and electromagnetic). (AW).

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Document Details

Document Type
Technical Report
Publication Date
Jun 01, 1988
Accession Number
ADA195884

Entities

People

  • Chu Kun Kuo
  • James J. Brophy

Organizations

  • University of Utah

Tags

Communities of Interest

  • Air Platforms

DTIC Thesaurus Topics

  • Carbonate Esters
  • Chemistry
  • Conductivity
  • Crystal Structure
  • Crystals
  • Equations
  • Frequency
  • Heat Treatment
  • Ion Density
  • Mathematics
  • Military Research
  • Physics
  • Quenching
  • Single Crystals
  • Spectra
  • Statistics
  • Two Dimensional

Fields of Study

  • Materials science

Readers

  • Materials Science and Engineering.