Microstructure and Properties of Co 2+ : ZnAl 2 O 4 /SiO 2 Nanocomposite Glasses Prepared by Sol–Gel Method
Transparent bulk Co 2+ : ZnAl 2 O 4 /SiO 2 nanocomposites containing nanocrystalline Co 2+ : ZnAl 2 O 4 dispersed in silica glass matrix were obtained by the sol–gel method. The gels of composition 89SiO 2 –6Al 2 O 3 –5ZnO− x CoO ( x =0.2, 0.4, 0.6, 0.8, 1.0) (mol%) were prepared at room temperature...
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| Published in | Journal of the American Ceramic Society Vol. 88; no. 2; pp. 399 - 403 |
|---|---|
| Main Authors | , , , , , , , , |
| Format | Journal Article |
| Language | English |
| Published |
01.02.2005
|
| Online Access | Get full text |
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| Summary: | Transparent bulk Co
2+
: ZnAl
2
O
4
/SiO
2
nanocomposites containing nanocrystalline Co
2+
: ZnAl
2
O
4
dispersed in silica glass matrix were obtained by the sol–gel method. The gels of composition 89SiO
2
–6Al
2
O
3
–5ZnO−
x
CoO (
x
=0.2, 0.4, 0.6, 0.8, 1.0) (mol%) were prepared at room temperature by using two different aluminum salts, aluminum nitrate and aluminum alkoxide (aluminum‐iso‐propoxide, Al(OPr
i
)
3
), as starting materials. The transparent gels were converted to the crystalline phase of gahnite by heating above 900°C. The microstructural evolution of gels was characterized. The effect of Co
2+
concentration on spectroscopic properties was also discussed. Co
2+
: ZnAl
2
O
4
nanocrystals dispersed in the SiO
2
‐based glass are formed at lower heat‐treatment temperature and shorter heating time by using Al(OPr
i
)
3
as raw material. |
|---|---|
| ISSN: | 0002-7820 1551-2916 |
| DOI: | 10.1111/j.1551-2916.2005.00053.x |