Influence of the pH Values of the Sol–Gel State on the Properties of SnO2 Powders Obtained From a Sol–Gel Route
The evolution of the specific surface area and crystallite size of SnO2 powders, prepared from a sol-gel process, was studied as a function of the calcination temperature of the stannic hydroxyde colloid, and for two different pH values (7.5 and 12.5) of the colloïdal state. The samples were charact...
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| Main Authors: | , , , , |
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| Format: | Article |
| Language: | English |
| Published: |
Wiley
1995-01-01
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| Series: | Active and Passive Electronic Components |
| Online Access: | http://dx.doi.org/10.1155/1995/36841 |
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| Summary: | The evolution of the specific surface area and crystallite size of SnO2 powders, prepared from a sol-gel
process, was studied as a function of the calcination temperature of the stannic hydroxyde colloid, and
for two different pH values (7.5 and 12.5) of the colloïdal state. The samples were characterized by
TGA, IR spectroscopy, BET, and XRD techniques. The crystallite size and specific surface area were
strongly affected not only by the calcination temperature, but unexpectedly, by the initial pH value of
the colloïdal state. A framework model, relating the pH dependence to the resulting properties, is
presented. |
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| ISSN: | 0882-7516 1563-5031 |