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《Electronic Components $ Materials》 2005-06
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Preparation and Structural Properties of SiO_2 :nm-Ag Fine Powders

DU Jin-hui, YU Zhen-rui, ZHANG Jia-you, LI Zheng-qun, WANG Yan-yan (Basic Science Department, Institute of Military Traffic, Tianjin 300161, China)  
Fine powders formed by nanometer Ag clusters embedded in SiO2 (SiO2:nm-Ag) were prepared by sol-gel method. The mechanism of the forming process was also explored. By using TG-DTA, XRD and TEM, the samples structural properties and their dependence on the fabrication parameters were studied. The result shows that SiO2:nm-Ag fine powders with different structures can be prepared by controlling preparation conditions. In the SiO2:nm-Ag fine powders prepared by annealing the grinded gel at 500℃, SiO2 mostly appeared with amorphous diatomite, Ag clusters are fine and well-distributed; and if changing the annealing temperature to 900℃, SiO2 mostly appeared with cristobalite low, and the Ag are aggregated into big clusters.
【Fund】: 国家自然科学基金资助项目(50172061)
【CateGory Index】: TB383
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