Corrosion of Alumina by Potassium Vapor

Corrosion of Alumina by Potassium Vapor

Resistance of sapphire and sintered Al sub 2 O sub 3 to corrosion by K vapor was examined at 1173 and 1373 K. As predicted from thermodynamic calculations, Al sub 2 O sub 3 was not stable. The K- beta -Al sub 2 O sub 3 formed had a preferential orientation with c-axis parallel to the surface. No pro...

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Veröffentlicht in:Journal of the American Ceramic Society 1992-01, Vol.75 (1), p.109-111
Hauptverfasser: van Hoek, Johan A. M., van Loo, Frans J. J., Metselaar, Rudi
Format: Artikel
Sprache:eng
Schlagworte:
Applied sciences
Building materials. Ceramics. Glasses
Ceramic industries
Chemical industry and chemicals
Exact sciences and technology
Miscellaneous
Technical ceramics
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Zusammenfassung:Resistance of sapphire and sintered Al sub 2 O sub 3 to corrosion by K vapor was examined at 1173 and 1373 K. As predicted from thermodynamic calculations, Al sub 2 O sub 3 was not stable. The K- beta -Al sub 2 O sub 3 formed had a preferential orientation with c-axis parallel to the surface. No protective layer against further corrosion formed. CaO as a dopant had no influence on corrosion reaction. 26 refs.
ISSN:0002-7820
1551-2916
DOI:10.1111/j.1151-2916.1992.tb05450.x