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Potassium Beta''‐Alumina Membranes
Author(s) -
CROSBIE G.M.,
TENNENHOUSE G.J.
Publication year - 1982
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.1151-2916.1982.tb10401.x
Subject(s) - potassium , crystallite , membrane , materials science , ion exchange , inorganic chemistry , molten salt , ion , chemistry , chemical engineering , metallurgy , organic chemistry , biochemistry , engineering
Although single‐crystal beta‐ and beta''‐aluminas can be ion‐exchanged by immersion in molten nitrates, polycrystalline membranes of Na‐β'‐Al 2 O 3 fracture on contact with molten KNO 3 . A KCl vapor ion‐exchange process allows synthesis of leaktight potassium‐ion‐conducting β''‐Al 2 O 3 membranes. Material properties, including results of electrical tests with molten potassium electrodes, are reported for a 12.65% K 2 O, 0.7% Li 2 O, 86.65% Al 2 O 3 composition.