Demonstration of 3-D-Printed Field-Emission Cathodes

被引：8
作者：
Connelly, Joseph M. [1 ]
Tang, Wilkin W. [1 ]
Harris, John R. [1 ]
Jensen, Kevin L. [2 ]
机构：
[1] AFRL, Directed Energy Directorate, Albuquerque, NM 87117 USA
[2] Naval Res Lab, Mat Sci & Technol Div, Washington, DC 20375 USA
来源：
IEEE TRANSACTIONS ON PLASMA SCIENCE | 2019年 / 47卷 / 09期
关键词：
3-D-printing; electron emission; field-emission cathode; ELECTRON-EMISSION; POLYMER NANOCOMPOSITES; EMITTER ARRAYS; FIBER;
D O I：
10.1109/TPS.2019.2931819
中图分类号：
O35 [流体力学]; O53 [等离子体物理学];
学科分类号：
070204 ; 080103 ; 080704 ;
摘要：
We report the first operation of field-emission cathodes produced from electrically conductive polymers using 3-D printing. These cathodes consisted of a single high-aspect-ratio emitter printed using a commercially available fused filament fabrication (FFF) printer. Emitters were printed from one of three commercially available polylactic acid (PLA) composite filaments. Each material produced appreciable field-emission currents, and an emitter with 0.4 mm diameter and 15 mm length sustained a dc current of 2.25 mA (similar to 1.8 A/cm(2)) for approximately 1 h before noticeable current degradation occurred. These initial experiments suggest that 3-D printing can provide a low-cost fabrication technique for future field-emission studies with novel cathode geometries.
引用
收藏
页码：4292 / 4300
页数：9
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