采用电泳和丝网印刷法在薄膜金属电极上制备Ag与碳纳米管(CNT)的复合阴极，系统研究了纳米Ag对CNT阴极场发射性能的影响，并对此导电机理进行了分析。利用扫描电子显微镜表征纳米Ag和CNT阴极的形貌，电泳沉积的纳米Ag粒不团聚，纳米Ag粒较均匀和致密。并与CNT阴极高温共烧结后，纳米Ag粒迁移至CNT阴极中，填补了CNT阴极与金属底电极间的接触空缺，还与CNT交错连接，形成CNT与金属底电极间良好的电学接触，改善了金属底电极与CNT间的电子传输和热传输。实验结果表明，利用纳米Ag作为过渡层可以改善和提高CNT阴极的场发射性能、亮度和稳定性。

Ag-CNT (carbon nanotube) composite cathodes are prepared on elaborate metal electrodes by electrophoresis and screen printing. The effects and conductive mechanism of nano-Ag on field emission properties of CNT cathodes are investigated. The morphologic images of nano-Ag film and Ag-CNT composite cathode are observed by scanning electronic microscopy (SEM). It is found that the nano-Ag particles are uniform and compact. The nano-Ag particles move to CNT cathode and fill up the contacting vacancy between CNT cathode and metal electrodes after co-sintered. So electronic transmission and heat transfer is improved between CNT cathode and metal electrodes. The experimental result show that the field emission properties, luminance and stability of CNT cathodes could be improved by the nano-Ag conductive film.