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Calcium-beta″-alumina: Preparation, properties and application to the solid oxide galvanic cells

✍ Scribed by G. Róg; W. Pycior; K. Zakuła; A. Kozłowska-Róg; M. Bućko

Publisher: Elsevier Science
Year: 1993
Tongue: English
Weight: 451 KB
Volume: 38
Category: Article
ISSN: 0013-4686
DOI: 10.1016/0013-4686(93)85152-o

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✦ Synopsis

Ahatract-Calcium-beta"-almina was prepared by ion exchange in an appropriate molten salt. It appeared to be practically pure beta"-AI,O,. The ionic conductivity was measured using molten salt electrodes and by a complex impedance analysis using platinum electrodes. The electronic conductivity was deduced from current-potential curves following the method of C. Wagner [Z. Electrochem, 60, 4 (1956)] and it was found to be negligible. Calcium-beta"-alumina was tested as a solid electrolyte in an oxide galvanic cell. In this way the free enthalpy of CaO.6Al,O, formation was determined. Its values for 1000, 1100 and 1200 K were compared with literature data.

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