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Silica and alumina powders: Part II. Coherence and strength of compacts
Author(s) -
Griffith Richard M.
Publication year - 1966
Publication title -
the canadian journal of chemical engineering
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.404
H-Index - 67
eISSN - 1939-019X
pISSN - 0008-4034
DOI - 10.1002/cjce.5450440211
Subject(s) - economies of agglomeration , materials science , brittle fracture , brittleness , composite material , catalysis , mechanical strength , fracture (geology) , mineralogy , chemical engineering , chemistry , organic chemistry , engineering
The mechanical strength of compacted silica and alumina powders was studied to gather information about agglomeration in general and the preparation of catalyst supports in particular. Substantial strength developed only if the conditions of preparation favored formation of oxygen crosslinks between adjacent particles through reaction between hydroxyl groups on adjacent surface. Strength rose sharply with solids fraction once a minimum value of about 0.2 was achieved and, in general, behaved as predicted from brittle fracture theory.