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Dehydration of Hydrous Zirconia with Methanol
Author(s) -
Jones Stanley L.,
Norman Colin J.
Publication year - 1988
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.1151-2916.1988.tb05871.x
Subject(s) - agglomerate , cubic zirconia , dehydration , methanol , zirconium , hydroxide , dehydration reaction , chemistry , condensation , alcohol , inorganic chemistry , nuclear chemistry , materials science , organic chemistry , composite material , ceramic , biochemistry , physics , thermodynamics
The washing of hydrous zirconia with alcohols to reduce the incidence of hard agglomerates on subsequent drying is well known. The results of methanol dehydration of hydrous zirconia (zirconium hydroxide), [Zr 4 (μ‐OH) 8 (OH) 8 (H 2 O) 8 ]˙ xH 2 O, show that only μ‐OH groups are unaffected. This suggests two things: First, the removal of nonbridging hydrooxo groups and water with alcohols such as methanol leads to a reduction/elimination of hard agglomerates. Second, hard agglomerate formation is associated with condensation reactions involving nonbridging hydroxo groups (Zr‐OH+HO‐Zr→Zr‐O‐Zr+H 2 O).