CAJ | 학술논문

在纳米金刚石场发射的基础上，研究了纳米金刚石掺混纳米碳管的场发射特性。采用电泳沉积法形成了纳米金刚石与纳米碳管的复合涂层，经热处理后制备出阴极样品，然后进行微观表征，再进行场发射特性测试与发光测试。结果表明，与未掺混的纳米金刚石阴极样品相比，复合涂层阴极样品的场发射开启电场明显减小，场发射电流提高，在较低的电场下阳极表面荧光粉就可以发光，但发光不均匀，出现了“边沿发光”的现象。分析了纳米金刚石掺混纳米碳管场发射性能提高的机理，是由于纳米碳管掺入之后，涂层的电子输运能力得到增强，涂层中有效发射体的数目增加。最后，解释了“边沿发光”现象的成因。
재납미금강석장발사적기출상，연구료납미금강석참혼납미탄관적장발사특성。채용전영침적법형성료납미금강석여납미탄관적복합도층，경열처리후제비출음겁양품，연후진행미관표정，재진행장발사특성측시여발광측시。결과표명，여미참혼적납미금강석음겁양품상비，복합도층음겁양품적장발사개계전장명현감소，장발사전류제고，재교저적전장하양겁표면형광분취가이발광，단발광불균균，출현료“변연발광”적현상。분석료납미금강석참혼납미탄관장발사성능제고적궤리，시유우납미탄관참입지후，도층적전자수운능력득도증강，도층중유효발사체적수목증가。최후，해석료“변연발광”현상적성인。
On the basis of field emission characteristics of nano-diamond, the field emission charac-teristics of diamond doped CNTs were studied. The composite coating of diamond and CNTs was formed using electrophoretic deposition, and the cathode samples were fabricated after heat treat-ment. The microstructure, field emission and luminescence performance of the samples were charac-terized. Compared with the undoped diamond cathode, the turn-on field of the composite coating cathode decreases obviously, the field emission current increases. The fluorescent powder on the an-ode surface can luminescent under lower electric field, but the luminescence is nonuniform and the phenomena of‘edge luminescence’ occurs. The improvement of the field emission characteristics is due the enhancement of the electron transportation capacity of the composite coating and the increase of the effective emitter number. Finally, the reasons of ‘edge luminescence’ were explained.