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Resistivity‐Microstructure Relations in Lithia‐Stabilized Polycrystalline β”‐Alumina
Author(s) -
VIRKAR ANIL V.,
MILLER GERALD R.,
GORDON RONALD S.
Publication year - 1978
Publication title -
journal of the american ceramic society
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.9
H-Index - 196
eISSN - 1551-2916
pISSN - 0002-7820
DOI - 10.1111/j.1151-2916.1978.tb09292.x
Subject(s) - crystallite , electrical resistivity and conductivity , microstructure , sodium , grain boundary , materials science , ion , grain size , mineralogy , activation energy , analytical chemistry (journal) , metallurgy , chemistry , physics , environmental chemistry , organic chemistry , quantum mechanics
The sodium ion resistivity of lithia‐stabilized polycrystalline β”‐alumina was measured as a function of temperature for fine‐grained and coarse‐grained specimens with a chemical composition of 8.80 Na 2 0‐0.75 Li 2 O‐90.45 A1 2 O 3 (wt%). A model is presented which explains the dependence of sodium ion resistivity on grain size. Using the model the activation energy was determined for the transport of sodium ions across a grain boundary in this form of sodium β”‐alumina.