Accession Number : ADA195884
Title : Diffusion Noise in Annealed Na, Ag and Pb Beta Aluminas.
Descriptive Note : Technical rept. Jan-Jun 88,
Corporate Author : UTAH UNIV SALT LAKE CITY DEPT OF PHYSICS
Personal Author(s) : Brophy, James J ; Kuo, Chu Kun
PDF Url : ADA195884
Report Date : Jun 1988
Pagination or Media Count : 14
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).
Descriptors : *ALUMINUM OXIDES, *CERAMIC MATERIALS, *ELECTRICAL CONDUCTIVITY, *NOISE(ELECTRICAL AND ELECTROMAGNETIC), ANNEALING, DIFFUSION, ION DENSITY, IONS, IONIC CURRENT, MOBILE, NOISE, QUENCHING, SILVER, SODIUM, TIME, VARIATIONS
Subject Categories : Ceramics, Refractories and Glass
Electricity and Magnetism
Distribution Statement : APPROVED FOR PUBLIC RELEASE