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Microstructure and Properties of Co 2+ : ZnAl 2 O 4 /SiO 2 Nanocomposite Glasses Prepared by Sol–Gel Method
Author(s) -
Duan XiuLan,
Yuan DuoRong,
Cheng XiuFeng,
Sun HaiQing,
Sun ZhiHong,
Wang XinQiang,
Wang ZengMei,
Xu Dong,
Lv MengKai
Publication year - 2005
Publication title -
journal of the american ceramic society
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.9
H-Index - 196
eISSN - 1551-2916
pISSN - 0002-7820
DOI - 10.1111/j.1551-2916.2005.00053.x
Subject(s) - materials science , nanocrystalline material , nanocomposite , alkoxide , microstructure , aluminium , sol gel , chemical engineering , nanocrystal , aluminium oxides , phase (matter) , mineralogy , composite material , nanotechnology , catalysis , chemistry , biochemistry , organic chemistry , engineering
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.