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Diphasic Xerogels, A New Class of Materials: Phases in the System Al 2 o 3 ‐Sio 2
Author(s) -
HOFFMAN DAVID W.,
ROY RUSTUM,
KOMARNENI SRIDHAR
Publication year - 1984
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.1151-2916.1984.tb19636.x
Subject(s) - materials science , chemical engineering , phase (matter) , powder diffraction , diffraction , mineralogy , crystallography , chemistry , optics , organic chemistry , physics , engineering
Two series of xerogels (desiccated hydrogels), one consisting of single phases and the other of two phases, were prepared from organic and inorganic precursors in the system Al 2 o 3 ‐Sio 2 . The effect of these nanostructural differences in the xerogel powders on the energy content and behavior on heating were studied using DTA, powder X‐ray diffraction, and ultrafast heating on a strip furnace. The results demonstrate that diphasic xerogels are substantially different materials from single‐phase xerogels of the same composition.