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Direct Coagulation Casting of Alumina Suspensions Using Jack Bean as a Urease Source
Author(s) -
Studart André R.,
Pandolfelli Victor C.,
Tervoort Elena,
Gauckler Ludwig J.
Publication year - 2002
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.1151-2916.2002.tb00337.x
Subject(s) - urease , slurry , coagulation , consolidation (business) , ceramic , hydrolysis , casting , materials science , chemistry , urea , composite material , metallurgy , biochemistry , psychiatry , psychology , accounting , business
This paper reports on the use of Jack bean meal as an alternative source of urease for direct coagulation casting (DCC) processes. Al 2 O 3 suspensions were prepared to compare the effect of Jack bean meal and pure urease on the hydrolysis of urea, the slurry coagulation rate, and the mechanical properties of consolidated bodies. Results indicate that the Jack bean meal is a promising economic alternative for the consolidation of ceramic parts, mainly because of its lower susceptibility to enzyme deactivation when exposed to room temperature and relatively humid environments.