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Crystallization Behavior of Al 2 O 3 in the Presence or SiO 2
Author(s) -
Chakravorty Akshoy Kumar,
Ghosh Dilip Kumar
Publication year - 1987
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.1151-2916.1987.tb04962.x
Subject(s) - aluminosilicate , cristobalite , crystallization , corundum , amorphous solid , spinel , phase (matter) , chemical engineering , mineralogy , materials science , crystallography , chemistry , metallurgy , catalysis , quartz , organic chemistry , engineering
The independent crystallization sequence of an Al 2 O 3 component is modified in the presence of SiO 2 and vice versa. Mixed SiO 2 ‐Al 2 O 3 , gel (28 wt% SiO 2 and 72 wt% Al 2 O 3 ) forms neither cristobalite nor γ‐Al 2 O 3 and corundum at 1000°C but forms Si‐Al spinel; an amorphous aluminosilicate phase invariably also forms after the gel is heated. However, the composition of this amorphous aluminosilicate phase is not as yet known.