| Ambient Drying and Cracking Phenomena
Monolithic Zirconia Gels
. 1n |
MINATI CHATTERJEE AND DIBYENDU GANGULI
Pages : 180-183
DOI : 10.1080/0371750X.1988.10822922 |
| Abstract |
| Preparation of monolithic zirconia gels from alkoxides has been
described for a series of compositions in the system zirconium propoxide-
2-propanol-acetylacetone-water. When large volumes of the
sols were cast in glass containers, an unusual crack pattern was observed
in all cases; in each sample, the crack divided the gel into a
top part with a central root-like protrusion and a bottom part surrounding
the protrusion. The bottom part characteristically contained
more volatiles than the top. The relatively high viscosity of the
alcohol and the adhesion of the gel to the glass container wall were
suggested to be the major factors guiding the crack pattern. |
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