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KMID : 1102020160460040227
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Applied Microscopy
2016 Volume.46 No. 4 p.227 ~ p.237
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Epoxylite Influence on Field Electron Emission Properties of Tungsten and Carbon Fiber Tips
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Alnawasreh Shady S
Al-Qudah Ala’a M.
Madanat Mazen A
Ali Emad S Bani
Almasri Ayman M
Mousa Marwan S.
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Abstract
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This investigation deals with the process of field electron emission from composite microemitters. Tested emitters consisted of a tungsten or carbon-fiber core, coated with a dielectric material. Two coating materials were used: (1) Clark Electromedical Instruments Epoxylite resin and (2) Epidian 6 Epoxy resin (based on bisphenol A). Various properties of these emitters were measured, including the current-voltage characteristics, which are presented as Fowler-Nordheim plots, and the corresponding electron emission images. A field electron microscope with a tip (cathode) to screen (anode) distance of 10 mm was used to electrically characterize the emitters. Measurements were carried out under ultrahigh vacuum conditions with a base pressure of 10?6 Pascal (10?8 mbar).
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KEYWORD
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Field electron emission, Composite micro-emitters, Dielectric materials, Fowler-Nordheim plots, Field electron microscope
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