Open AccessInfluence of the pH Values of the Sol–Gel State on the Properties of SnO2Powders Obtained From a Sol–Gel Route
Author(s) -
Shuo Han,
S. Y. Huang,
G. Campet,
M. Kennard,
Y. M. Son
Publication year - 1994
Publication title -
active and passive electronic components
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.144
H-Index - 22
eISSN - 1026-7034
pISSN - 0882-7516
DOI - 10.1155/1995/36841
Subject(s) - calcination , crystallite , sol gel , colloid , chemical engineering , specific surface area , materials science , spectroscopy , mineralogy , chemistry , analytical chemistry (journal) , nanotechnology , chromatography , catalysis , metallurgy , organic chemistry , physics , quantum mechanics , engineering
The evolution of the specific surface area and crystallite size of SnO2 powders, prepared from a sol-gelprocess, was studied as a function of the calcination temperature of the stannic hydroxyde colloid, andfor two different pH values (7.5 and 12.5) of the colloïdal state. The samples were characterized byTGA, IR spectroscopy, BET, and XRD techniques. The crystallite size and specific surface area werestrongly affected not only by the calcination temperature, but unexpectedly, by the initial pH value ofthe colloïdal state. A framework model, relating the pH dependence to the resulting properties, ispresented
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