Composite effect of solid electrolytes based on alkali carbonates and sulfates

S. Brosda*, H. J.M. Bouwmeester, U. Guth

*Corresponding author for this work

Research output: Contribution to journalArticleAcademicpeer-review

4 Citations (Scopus)


To improve both the thermal stability and the electrical conductivity, alkali ion conducting carbonates and sulfates with admixtures of alkaline earth compounds as well as insulating materials such as γ-Al2O 3 were prepared and characterized by conductivity measurements, X-ray studies, DSC and SEM/EDX. The addition of the divalent carbonates and sulphates causes two effects. On the one hand side, the alkali earth compounds can be dissolved depending on the ionic radius to a more or less large extent, which is accompanied by an increase in the electrical conductivity. On the other hand side, a two phase mixture consisting of an excess of dopant is formed with an enhancement in the conductivity and improvement of the mechanical stability. This phenomenon, known as composite effect, could be observed in the following systems Na2CO3-BaCO3, Na2CO 3-SrCO3, Na2SO4-BaSO4, K2SO4-BaSO4, Na2SO 4-γ-Al2O3, K2SO 4-γ-Al2O3.

Original languageEnglish
Pages (from-to)323-328
Number of pages6
Issue number3-4
Publication statusPublished - May 1996


  • METIS-106488


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