Substructure and properties of sodium beta alumina solid electrolytes. Interim report, June 1, 1974--May 31, 1975
- 1 July 1975
- report
- Published by Office of Scientific and Technical Information (OSTI)
Abstract
The relation of the properties of sodium beta alumina to its microstructure and impurity content was investigated. The electrolyte was prepared from both laboratory and commercial powders; a method that significantly improves the sinterability of commercial sodium ..beta.. alumina powders was developed. The ac conductivity, effects of calcium on the ionic conductivity, apparent activation energies as a function of temperature, grain boundary activation energies, and microstructure of ..beta.. alumina were studied. It was found that Ca is a particularly deleterious impurity. The activation energy for inter- and transgranular ionic conduction was temperature independent. Some complex crystallographic faults were found that may be partially responsible for some frequency dependence of the complex impedance of the solid electrolyte. 17 figs., 1 table. (RWR)Keywords
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