ISSN:
1551-2916
Source:
Blackwell Publishing Journal Backfiles 1879-2005
Topics:
Mechanical Engineering, Materials Science, Production Engineering, Mining and Metallurgy, Traffic Engineering, Precision Mechanics
,
Physics
Notes:
Transparent bulk Co2+: ZnAl2O4/SiO2 nanocomposites containing nanocrystalline Co2+: ZnAl2O4 dispersed in silica glass matrix were obtained by the sol–gel method. The gels of composition 89SiO2–6Al2O3–5ZnO−xCoO (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(OPri)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 Co2+ concentration on spectroscopic properties was also discussed. Co2+: ZnAl2O4 nanocrystals dispersed in the SiO2-based glass are formed at lower heat-treatment temperature and shorter heating time by using Al(OPri)3 as raw material.
Type of Medium:
Electronic Resource
URL:
http://dx.doi.org/10.1111/j.1551-2916.2005.00053.x
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