Ag/SiO_2纳米复合材料的制备及其导电性能研究  

Studies on Preparation of Ag/SiO_2 Nanocomposite and its Electrical Properties

作　　者：王果[1] 戴静[1] 毛从文[1] 蒋新[1] 

机构地区：[1]浙江大学材料与化学工程学院,浙江杭州310027

出　　处：《材料科学与工程学报》2006年第5期761-765,共5页Journal of Materials Science and Engineering

基　　金：国家自然科学基金资助项目(20476088);浙江科技计划资助项目(2005C31057)

摘　　要：利用新型吸附相反应技术,以纳米SiO2表面的吸附水层为反应器,制备Ag/SiO2纳米复合材料。初步探讨了水醇配比和反应物浓度对纳米银晶粒粒径及复合材料电阻率(ρ)的影响。结果表明,改变体系中水醇配比和氢氧化钠浓度,可控制银晶粒大小。而银晶粒粒径的改变会对复合材料的电阻率产生一定影响。经万用表测量分析可知,银含量是纳米复合材料电阻率的决定性因素。该工艺得到的Ag/SiO2复合材料电阻率大小可控,银粒子分散性好。Ag/SiO2 nanocomposite was prepared by a new fashion of absorption-reacting technique, utilizing nanoreactor formed by adsorption water layer on SiO2 surface. The influence of the binary liquids ratio and reactant concentration on the Ag average particle size and nanocomposite conductance was studied. TEM and XRD revealed that the Ag average particle size could be controlled by varying binary liquids ratio and base content. And the Ag average particle size further influenced nanocomposite conductance because of electric mechanism in nanocomposite. Ag content was found to be the key factor on conductance by multimeter analysis. The Ag/SiO2 composite obtained has a controllable conductance and good dispersive property.

关 键 词：吸附相反应技术 纳米复合材料 AG 平均粒径 电阻率 

分 类 号：TQ03[化学工程]