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Morphology and Crystallization Behavior of Sol‐Gel‐Derived Titania
Author(s) -
Slunecko Jaroslav,
Kosec Marija,
Holc Janez,
Drazic Goran,
Orel Boris
Publication year - 1998
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.1151-2916.1998.tb02458.x
Subject(s) - rutile , anatase , crystallization , relative humidity , materials science , chemical engineering , morphology (biology) , humidity , sol gel , hydrolysis , titanium , mineralogy , chemistry , nanotechnology , metallurgy , catalysis , organic chemistry , photocatalysis , physics , genetics , biology , thermodynamics , engineering
TiO 2 sols were prepared by hydrolysis of titanium ethoxide. The sols were exposed for several days at room temperature to atmospheres of different humidity in order to study its influence during aging of sols on rutile formation, morphology, and crystal structure. Exposure of sols to high relative humidity resulted in nonagglomerated TiO 2 powders with a rutile structure. TiO 2 gels obtained from sols aged at low relative humidity were composed of gel fragments with a poorly crystallized anatase structure.