纳米银及其导电浆料的制备与研究  

Synthesis and study of silver nanoparticle and conductive paste

作　　者：董春法[1] 张祥林[1] 付锐平[2] 蔡昊[1] 

机构地区：[1]华中科技大学材料学院材料成形与模具技术国家重点实验室,湖北武汉430074 [2]华中科技大学文华学院,湖北武汉430074

出　　处：《电子元件与材料》2013年第9期30-34,共5页Electronic Components And Materials

基　　金：珠海市科技计划产学研重大资助项目(No.2010A050101004)

摘　　要：以聚丙烯酸铵为保护剂,水合肼或葡萄糖为还原剂,采用液相化学还原法成功制备了单分散的纳米银颗粒。利用透射电子显微镜,X射线衍射对样品的形貌和结构进行了分析。利用紫外-可见分光光度计对纳米银溶胶的粒径大小分布及其稳定性进行了分析。把制得的纳米银分散在一定量丙三醇中,涂在载玻片上并烧结,对其表面性能进行分析。研究结果表明,所制备的纳米银溶胶的稳定性较好,氨水及还原剂的种类对纳米银的粒径和形貌有重要的影响。以水合肼为还原剂制得的纳米银的平均粒径为10 nm,粒径分布在6 nm到15 nm。烧结后的纳米银的表面形状较好,具有良好的导电性,其体积电阻率约为3.5×10–5·cm。Silver nanoparticles with narrow distribution were prepared by aqueous chemical reduced route in presence of poly-acrylic acid ammonium as capping agents, hydrazine hydrate or glucose as reducing agents. The morphology and crystal structure of silver nanoparticles were demonstrated by transmission electron microscopy and X-ray powder diffraction. The size distribution and the stability of as-synthesized silver nanosol were studied by the UV-Vis spectrophotometer. The obtained silver nanoparticles was added into glycerol, coated on a glass slide and sintered. The results show that the stability of as-synthesized silver nanosol is perfect. Ammonia and reducing agents play an important role in the morphology and size distribution of silver nanopaticels. Sizes of silver nanoparticles reduced by hydrazine hydrate are l0 nm on average with a narrow distribution from 6 nm to 15 nm. The surface shape and the conductivity of silver nanoparticles after sintering are perfect and the volume resistivity is about 3.5×10^-5 Ω. cm.

关 键 词：导电浆料 纳米银 聚丙烯酸铵 化学还原法 烧结 稳定性 

分 类 号：TB383[一般工业技术—材料科学与工程]