Finely divided silver nanoparticles were synthesized via the hydrothermal method. Arabic gum （AG） was used as both the reductant and steric stabilizer without any other surfactant. By adjusting the reaction temperature, mass ratio of AG to AgNO3, and reaction time, silver nanoparticles with different morphological characteristics could be obtained. The products were characterized by UV-Vis, FTIR, TEM, SEM, and XRD measurements. It was found that temperature and AG played an important role in the synthesis of mono-disperse silver nanoparticles. Well dispersed and quasispherical silver nanoparticles were obtained under the optimal synthesis conditions of 10 mmol/L AgNO3, m（AG）/m（AgN03）= l：1, 160 ℃ and 3 h.
借助黏度测试仪、扫描电镜及红外光谱、非等温差示扫描量热法等分析手段,通过测量体积电阻率、附着力和硬度,探讨了以糠醛–丙酮作为E-51环氧树脂/双氰胺体系导电银浆的活性稀释剂时,稀释剂含量对体系黏度及所得导电膜断面形貌、机械性能和导电性的影响。另外讨论了固化时间对导电膜导电性的影响。结果表明:随稀释剂含量增加,银浆的黏度迅速下降,稀释剂含量为25.0%时,黏度下降了87.5%;综合考虑银浆的固化程度、丝网印刷效果、导电性和机械性能,选择稀释剂含量为12.0%,此时所得导电膜性能最佳:固化最完全,体积电阻率最小(1.33×10^(-5)Ω·cm),导电性最好,硬度5H,附着力4B。根据动力学分析,最佳固化温度为148.33°C,该固化反应级数是0.79,反应活化能为27.51 k J/mol。
