Microstructure and Properties of Co^sup 2+^: ZnAl^sub 2^O^sub 4^/SiO^sub 2^ Nanocomposite Glasses Prepared by Sol-Gel Method

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 differen...

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Bibliographic Details
Published inJournal of the American Ceramic Society Vol. 88; no. 2; p. 399
Main Authors Xiu-Lan Duan, Duo-Rong Yuan, Xiu-Feng, Cheng, Hai-Qing Sun
Format Journal Article
LanguageEnglish
Published Columbus Wiley Subscription Services, Inc 01.02.2005
Subjects
Aluminum composites
Glass substrates
Heat treating
Microstructure
Nanostructured ceramics
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Summary: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 degrees 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. [PUBLICATION ABSTRACT]
ISSN:0002-7820
1551-2916