| Autor: | M.E. Compeán-Jasso, Facundo Ruiz, G. Ortega-Zarzosa, C. Araujo-Andrade, J. R. Martínez |
|---|---|
| Rok vydání: | 2002 |
| Předmět: |
inorganic chemicals
Materials science Infrared Annealing (metallurgy) Inorganic chemistry chemistry.chemical_element Infrared spectroscopy General Chemistry Condensed Matter Physics Silicate Electronic Optical and Magnetic Materials Biomaterials chemistry.chemical_compound chemistry X-ray crystallography Materials Chemistry Ceramics and Composites Cobalt Cobalt oxide Sol-gel |
| Zdroj: | Journal of Sol-Gel Science and Technology. 24:23-29 |
| ISSN: | 0928-0707 |
| DOI: | 10.1023/a:1015105414916 |
| Popis: | Using x-ray diffraction, infrared and visible absorption spectroscopies we have studied: silica xerogel powders when cobalt nitrate is incorporated and mainly the evolution of the precipitated cobalt species in the SiO2 matrix. Samples containing cobalt nitrate and prepared with a molar ratio of H2O/TEOS of 11.67 were studied as a function of annealing temperature. It was found that the added element has a remarkable influence on the final structure of this kind of samples and at relatively high temperatures the cobalt compounds react with the silica matrix forming a cobalt silicate. |
| Databáze: | OpenAIRE |
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