| 1. | When we produce field emitting cold cathodes , we must consider not only the work function , conductance , density , reliability and mission capability but also the demand of technique 在制备场发射阴极时,必须考虑到材料功函数、电导率、密度、热稳定性、化学稳定性等因素对其发射性能的影响,同时要考虑材料对加工工艺上的要求。 |