标题:Microstructural evolution of transparent glass-ceramics containing CO2+: MgAl2O4 nanocrystals
作者:Duan, XL; Yuan, DR; Luan, C; Sun, ZH; Xu, D; Lv, MK
作者机构:[Duan, XL; Yuan, DR; Luan, C; Sun, ZH; Xu, D; Lv, MK]Shandong Univ, State Key Lab Crystal Mat, Jinan 250100, Peoples R China.
通讯作者:Duan, X
通讯作者地址:[Duan, XL]Shandong Univ, State Key Lab Crystal Mat, Jinan 250100, Peoples R China.
来源:JOURNAL OF NON-CRYSTALLINE SOLIDS
出版年:2003
卷:328
期:1-3
页码:245-249
DOI:10.1016/j.jnonerysol.2003.08.045
摘要:Transparent glass-ceramics containing Co2+: MgAl2O4 nanocrystals were obtained by the sol-gel process. The gels with composition of 4.9MgO-5.9Al(2)O(3)-89SiO(2)-0.2CoO (mol%) (MAS) were prepared at room temperature, and heat-treated at different temperatures. The structural evolution of the samples was studied with X-ray diffraction (XRD) and infrared spectra. Co2+: MgAl2O4 nanocrystals were precipitated from the MAS system and dispersed in the SiO2-based glass when the sample was heated at 1000 degreesC. Optical absorption spectra showed that Co2+ ions were located in tetrahedral sites replacing Mg2+ ions in MgAl2O4 nanocrystals. TEM revealed spherical nanocrystals of the size of about 5-15 nm, depending on the heat-treatment temperature. The Co2+: MgAl2O4 nanocrystals in the amorphous silica matrix proved to be very stable up to 1100 degreesC without any decomposition. (C) 2003 Elsevier B.V. All rights reserved.
收录类别:EI;SCOPUS;SCIE
WOS核心被引频次:10
Scopus被引频次:13
资源类型:期刊论文
原文链接:https://www.scopus.com/inward/record.uri?eid=2-s2.0-0141754186&doi=10.1016%2fj.jnoncrysol.2003.08.045&partnerID=40&md5=717f61963977be5c4a7f3179bfc0a377
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