中文摘要：

在传统的热阴极表面制备催化剂，通过自加热化学气相沉积法，成功地在热阴极表面生长出碳纳米管薄膜．碳纳米管薄膜具有较好的场致发射能力，通过二极结构下对该阴极的发射性能测试，得到了最大电流为5．5mA的场致发射电流．该方法可以在不改变现有热阴极材料和器件结构的基础上，得到稳定的冷阴极发射电流，为热阴极向冷阴极过渡的研究提供了一种途径．

英文摘要：

Based on a traditional thermal cathode, catalyst material layer has been deposited, and then carbon nanotube layer has been synthesized on the surface of the thermal cathode by self-heated chemical vapor deposition. As is known, carbon nanotube has excellent field emission properties, and the field emission capability of this cathode has been tested in a diode structure, a maximum 5.4mA current has been obtained. We provide a new way to realize field emission large current on a traditional thermal cathode device while the cathode material and the whole structure need not be changed.